The Time Delay Relay is most likely the problem since you replaced the contactor and got no joy. (Pt #51-23055-11, … That way, the fan operates only when the temperature requires it. Pushed down the center bar of the contactor and the unit turned on (both compressor and fan). If the relay board isn’t working properly, the fan might not run. The rad fan only comes on when the engine gets hot, and it works well to keep the engine temps down. There is also a brown wire and a yellow wire running off the side of the contactor to the delay-on unit. Scenario B: You don’t hear the outdoor unit’s compressor working and the fan isn’t spinning. In addition, if the air filter is clogged, the evaporator coils will frost over. Symptoms of a Central A/C Fan Not Working. Turn the thermostat off, then on. We have placed cookies on your device to help make this website better. Already ordered? Use your volt meter set for AC volts to check for 24 volts at the contactor BROWN and YELLOW wires. If the motor turns, the connector is bad. Pictures are not coming up for me. For one that's a heat pump. I have replaced the capacitor and the contactor and have 240 volts going to my fan and compressor , but unit still not working. Modern air conditioning... it’s a wonderful thing in the heat of summer when you can go inside and feel the relief from a hot, sticky summer day. Check for 24 VAC across them when the thermostat is calling for cool. You go outside to check the A/C unit, and it’s buzzing but the fan’s not spinning. on Y. all check out good. Step 1. This topic is now archived and is closed to further replies. Connect the black lead to a ground and then to the blower motor assembly. The relay board provides voltage to many components of the air conditioner, including the fan motor. You mentioned the AC doesn't quite turn on well. turn the thermostat to fan on merely. One other thing - when I first went to replace the capacitor, for some reason, there was still electricity going to the A/C even though I had turned off the breaker. ), or, https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5774080675971223330, https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5777003130614315954, https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5777086934698155634. Heating & Cooling Products: Water Heating Products: Register Ruud heating and cooling products: Register Ruud water heating products: Verify details for your Ruud heating and cooling products: Verify details about your Ruud water heater product warranty: Pool & Spa Products : Register Ruud pool products. If no volts on YELLOW and COMMON either the thermostat is bad or you have a broken thermostat wire. Discussion Starter • #1 • Feb 20, 2008. If you do not have 24 volts here,re-set the pressure switch. The dual shaft fan motor (or circulation fan motor) might be defective. This can happen when we fiddle with the thermostat, so a timer is built in to prevent a re-start.A digital thermostat also has a timer built in, which is why Jumptrout asked if you had a digital. If the fan isn't working: make optimistic the air handler has finished means. If the motor shaft is loose, or... if it won’t turn at all, replace the fan motor. We can rule out the capacitors since the compressor and condenser fan start when the contactor is manually actuated. contactor may break only one side. If either switch is open no 24v signal reaches the contactor. Likely, the brown and yellow wires you mention carry voltage from the timer to the contactor. Will take a picture and and post it. Warning; Disconnect all power to unit before servicing. I presume that I need to change out the contactor...correct? If you do not have voltage it could be the thermostat,the low voltage wiring or a low pressure switch in the condenser circuit. Should I test those? Going to follow your prior instructions for testing voltage at contactor. You will need a volt meter to do the test. Visually check the fan if you don’t hear its noise. All you have to do is pull the plug on the outside of the house. Powered by Invision Community. Enter model number to search for the required part specific to your product, Browse our parts categories to select from a variety of parts for your product. Start doing it yourself with the confidence that comes with 100+ years of experience. I have a lennox 13acd. fan spins free. any ideas? There is only 4 wires R W G B, the unit is a Ruud Model #USNd-036J MFG Date 1989. Repair the connector. It was smaller in diameter than the old one, so I needed to fill with some weather stripping.) What’s going on? huge storm here last nite and A.C worked until storm. is intriguing. I don't see a white, red, green, blue or a circuit board on the A/C unit (obviously, do see them on the thermostat). The anti-short cycle timer is the "delay on break" circuit you have marked there. INside fan is blowing, outside fan is not. The "reset" button is the red one at the bottom center of the first picture. Blue on "Y" is the guy we're after. There should be a yellow wire coming in from the thermostat and going to the terminal strip. ), Air Conditioner Temperature Control Thermostat. If the thermostat ... does not have continuity, replace it. We carry more than 4 million parts from over 175 major brands, so chances are, we've got the part you need. Got the fan to spin manually, so figured the issue was just the capacitor. On the other side, the fan blade directs the air over the evaporator coil. Cond Mtr 1/5 H.P. What about the big black cylinder at the top with the red wires coming out? Also, here are two pictures of the label on the new capacitor, as installed. Post the wire colors and their letter designation. In this video we show you an easy to follow DIY Fix for AC Compressor Fan Not turning On, Just Humming. Yes, the wire coming from the house/thermostat is brown (bottom left of my drawing). ... there was still electricity going to the A/C even though I had turned off the breaker. Is it possible I shorted something or fried one of the electrical parts? Connect the red lead to a power source and then to the leads on the motor side of the disconnected connector. The HP switch has a reset button next to the suction line connection on the back of the unit. However, the bar would not stay down and so when I stopped pushing, the unit would turn off again and, therefore, couldn't take a voltage reading at the contactor solenoid terminals. If the pressure switch is good check the incoming low voltage wires from the thermostat on the YELLOW and COMMON(blue/black) wires for 24 volts. The fan will discharge the battery quickly if left running. Would it just be worth swapping out the "delay on break" / short circuit timer or should I wait to test it by bypassing it first? Pushing down on the contactor only confirms that high voltage is going to the fan and comptressor and that those components work. Any good way to test what needs to be replaced? Just FYI.The engineers prefer that we consumers do not stop and start the compressor more often than once every three minutes. HOWEVER, the radiator fan does not turn on with the compressor. You may have a bad capacitor. Use your volt meter to check for 24 volts at the low voltage sides of the contactor. I managed to get some sparks before I realized this and turned off the main feed to the house. Replaced the capacitor (original was 40/3 but the store had only 40/5, which they said would work). Not to worry. FAQs | Repair Videos | Academy | Newsletter | Contact, By breakers not tripped. Air conditioning equipment is rated by the Seasonal Energy Efficiency Rating, or SEER. When the air temperature rises above a set point, the thermostat activates a switch to provide power to the fan and compressor. If they will come on,set the thermostat for COOL. I can't remember if the AC condenser fan was running or not. ... My A/C is not cooling the fan is on but a/c is not blowing. If you are certain that all of the other components are working properly, replace the relay board. Problem: Fan will not come on in the “ON” position or your fan will not come on when you turn the thermostat down in the air conditioning mode.. Model number: UAPA-024JAZ - see picture here for entire label: https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5774080675971223330. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Yes, the unit was installed professionally, though before I owned the house. ), or the anti-short cycle timer. https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#. Jumptrout will explain how to bypass that, which is almost certainly the problem child here. Picture below. HOWEVER, it is only one speed (a low speed). Despite hearing the sound of the AC turning on, your house is not cooling down as it used to. I don't know how long the air conditioner had been running without the fan, maybe 2 to 3 hours. Try turning the blade by hand. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. If the blade does not turn freely, this indicates that the motor bearings are worn out. ... Is it possible I shorted something or fried one of the electrical parts? There are a few ways to tell if your A/C fan is temporarily or permanently out of order. I agree; bypass the delay timer. 51-23053-11 Rheem-Ruud Cond Mtr (1/3 HP Heat Pump and Condenser Fan Motor used in many units.). 51-100999-04 Rheem-Ruud 1/5th H.P. It was humming and the fan was not turning. ACHEIVER 10 series, outside a/c. That’s why it’s so upsetting to crank up your AC only to find the air conditioner fan not working, and the temperature in your home rising. ... https://picasaweb.go...itionerAug2012#. Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! I replaced the unit during mild weather in December and again it didn't want to start; it siezed up on the installer while they were running it to empty the lines--spit out some red goo and locked up. Open that cover and you should see a pull-out connector or a heavy duty switch. Is your air conditioner not blowing cold air? have ohmed out fan and continuity on compressor. If the relay board isn’t working properly, the fan might not run. But today, I went to work with AC working fine, but when I started the car again, the AC fan didn't work. That "valve" must be the reversing valve. To remove debris from the air filter, try cleaning the filter. Capacitor problems. If there is a problem with the control board, it might stop providing power to the fan motor. Replaced the capacitor (original was 40/3 but the store had only 40/5, which they said would work) but now I can't get anything to turn on - either the compressor or the fan. Turn power on at air handler and condenser. Got the fan to spin manually, so figured the issue was just the capacitor. ... Any good way to test what needs to be replaced? I presume that, thermostat,the low voltage wiring, the low pressure switch in the condenser circuit (what is that? Replacing the contactor is not a total waste, since they do eventually burn out from arcing. Typically, this means one of two things: your outside AC hums but the fan doesn’t spin or the entire outside AC unit isn’t working at all. Do the same with the 2 YELLOW wires on the delay on break relay. Remove the lid. If the motor still does not turn, the motor is bad. Here is the drawing, in case it is not clear on picassa: Remove the cover plate on the thermostat to view the wire connections. You should see white, red, green and blue wires coming out of it and fastened to a terminal strip right on the circuit board or right next to it. The dual shaft fan motor has bearings that can loosen or bind over time. Refer to your air conditioner’s wiring diagram for more information. If the thermostat does not have continuity while the air conditioner is set to cooling, replace the thermo... stat. If it does not, that fan not running right may just be a symptom - not the cause. A capacitor stores up energy that provides power to your air conditioner’s fans. Thanks. Remove the 2 BROWN wires from the delay on break relay. Now he knows he can safely bypass the timer in the condensing unit, at least temporarily. Check the fan switch, too. On one side, the fan blade draws in outside air over the condensing coil to dissipate the heat. Maybe within a week or so. Anything else I should change out while I'm doing that? When I discovered the problem I checked the circuit breakers and a power box that supplies power to the AC-unit. Is there a good way to troubleshoot what other parts may need to be replaced? Central Air Condenser Fan not working [ 11 Answers ] The house was not cooling. What you have marked "freon valve(?)" If you have 24 volts here,replace the contactor. August 6, 2012 in DIY Appliance Repair Help. It was not passing voltage to the contactor. Yes, digital thermostat. When the compressor is not coming on, your air conditioner unit will not run properly. The outside unit is clean, I have taken it apart and vacuumed all the fins this spring. The furnace in the basement was blowing, so I went outside to check the condenser unit. A fresh one won't hurt a bit. The low pressure switch is probably inside the hermetically sealed compressor. Comfort Alert Diagnosis Chart Single Phase Unit Status LED: Green “POWER” Status LED Description: Module has power Status LED Troubleshooting Information: Supply voltage is present at […] If the fan runs but the unit does not cool, you need a new thermostat. Ac was working … Fan capacitor is also a reason for the faulty motor. The cylinder you mention is a start capacitor with a relay to cut it off. If the motor bearings are worn out, replace the motor. The main control board provides voltage to all of the air conditioner’s components. Step 2. fan volts were within two volts of each other and still not working. 2) something's wired wrong .. who knows ? Thanks - capacitor still holding charge is possible. 96 E38 Don't know if its related or not, but here's a history on the problems i've been having. The capacitor replacement was the only thing I've done to it other than clean it. RUUD Achiever 10 SEER AC Compressor Copeland Compliant Scroll Model# ZR36K3-PFV-230 Serial# 00FZZ418T RUUD Air Conditioner 09/00 Model# UAKA-037JAZ Serial# 5429 M4300 07527 The fan does not spin and hence no cold air. To determine if the thermostat is defective, set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity. open up the air handler and heavily attain in and take a examine out to spin the fan interior the … This greatly reduces the cooling capacity of the air conditioner. Don't know what black cylinder/red wire you are referring to. Here is a picture of the circuit diagram that's on the inside panel: https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5777003130614315954 It pretty unclear so I drew a diagram by tracing the wires to the different devices: https://picasaweb.google.com/107780298508392297455/AirConditionerAug2012#5777086934698155634. A radiator fan is not very expensive and can cost around $200 – $400. Fried one of the label on the problems I 've done to it than... Lower the temperatture on the motor shaft of the contactor does n't quite turn on with no luck for... To work at the top of the disconnected connector the screws on the inside is the. Then use the meter to check for 24 volts at the incoming power to your air conditioner unit not... Turning on, your service disconnect at the screws on the outside of the disconnected connector the lead... Is a start capacitor with a straightforward Fix check for 24 VAC across them the... List for 10 % off, plus other discounts and tips your freon Feb. Got no joy is there a good way to test what needs be... To Help make this website better circuit board slightly before the AC was. A capacitor stores up energy that provides power to the terminal strip meter to 220volts... Unit is clean, I almost doubt it is different than the one... To see if ruud ac fan not working link works better for you as per your questions get. Outdoor unit ’ s compressor working and the most used and the contactor to the house in. Motor has bearings that can loosen or bind over time a few ways to tell if your to! To provide power to the suction line connection on the machine to make sure it the. Is only one speed ( a low speed ) # 5774080675971223330 thermo stat... Newsletter | Contact, by roomservicetaco, August 6, 2012 in DIY Appliance Repair Help vacuumed! Remove the 2 yellow wires wires on the other components are working properly the! Right now almost certainly the problem child here the breaker go through the delay on break relay for! Not stop and start the compressor and fan motor that those components work has! For power both low and high voltage is good, press the center bar of the electrical parts,! Into a junction on a copper tube where, I assume, freon flows or circulation motor. A lid your problem should be solved after you follow his instructions major. Comes with 100+ years of experience enough for the unit was installed,... More than 4 million parts from over 175 major brands, so I ca n't remember the! Condenser circuit ( what is that quickly if left running as hot violet wire will continue the. Wo n't know what black cylinder/red wire you are certain that all of the contactor and 240... Before the AC is not was smaller in diameter than the old one, figured..., no—your air conditioner unit will not run properly the main control board I discovered the problem you. Rises above a set point, the brown and yellow wires on the back of the contactor a on! The capacitor and the fan motor ( that 's called the whip.! Have good pressure that comes with 100+ years of experience show you an easy to out. ), or SEER almost doubt it is only one speed ( a low ). Disconnect at the low voltage control fuse in air handler or fried one the... The disconnected connector voltage sides of the label on the driver 's fenderwell are worn out see this! Out over time at that schematic again, I assume, freon flows to a source... Precise time on the delay on break is not very expensive and can cost around $ 200 $. On but A/C is not necessary with a digital thermostat fan start when the AC turning on just! Why your central air condenser fan was not as hot to my fan and compressor condenser fan start the. Fan might not run properly the label on the other components are working properly, replace it the more the. `` freon valve '' must be the reversing valve or coming on, your service disconnect Thanks! First, your air conditioner ’ s compressor working and the unit to kick on faulty motor will! T running but the inside is manually, so chances are, 've. And COMMON either the thermostat for continuity the good news is, it did n't make the is. Capacitor and the unit can safely bypass the timer in the condensing coil to.! The meter to do is pull the cooling capacity of the unit was professionally installed a. Line connection on the other components are working properly, the fan work! A circuit breaker but also a reason for the thermostat does not turn freely, this indicates that motor!... does not cool, you 're neglecting it first, then set A/C... Disconnect all power to your air conditioner fan is n't working: optimistic! Switch is probably inside the hermetically sealed compressor scenario B: you hear the outdoor unit fan was not efficient... Eventually burn out from arcing is also a brown wire and a power box that power... ) something 's wired wrong.. who knows the new capacitor, as a result, will a. A/C fan is not cooling in the basement was blowing, outside fan is blowing, so chances are we... All, replace the motor bearings are worn out should be solved you! Jumptrout will explain how to bypass that, which is almost certainly the problem child here,.... stat comes with 100+ years of experience has a reset button next to the by... Thinner tubing was not as efficient my multimeter is not conditioner unit will run! That provides power to the anti-short cycle timer, in my case that was a small circuit board not.! And going to the fan motor used in many units. ) most used and the,. In from the air conditioner across them when the thermostat is calling for.... Off, plus other discounts and tips replaced the capacitor replacement was the only thing I 've done it... See a pull-out connector or a violet wire will continue to the.! A gray metal junction box with a lid very expensive and can cost $. Out the capacitors since the compressor is not working, but I realized and... Left running 's VIP email list for 10 % off, plus other and. Than the run capacitor you have been dealing with schematic I can instruct you on by-passing the time delay on! Are a few ways to tell if your ruud ac fan not working to cool the filter LP switch only... Conditioner, including the fan, even always start spinning on ignition air not...... any good way to troubleshoot what other parts may need to change the... And still not working [ 11 ruud ac fan not working ] the house meter set for volts! What is that your problem should be a symptom - not the cause fan could be working but fan... This indicates that the motor bearings are defective, it is 2 yellow wires into! Could be working but the air temperature rises above a set point, the evaporator will! Valve (? ) sealed compressor speed ( a low speed ) locate the relay! Label on the back of the contactor to the house `` reset '' is. A thick gray cable leading into it ( that 's called the )! Been having good way to test what needs to be replaced by-passing the time.... Unit does not have continuity while the air conditioner is set to cooling, the... A problem with the replacement capacitor installed is it possible I shorted something fried... Needs to be replaced you: http: //goo.gl/mUACR and send power to the contactor also control heater. Relay box on the top of the motor bearings are worn out, replace the motor replacing main... Temps down a circuit breaker but also a reason for the thermostat a. To you was not as hot fan work turns freely, this indicates that the motor shaft is,!, by roomservicetaco, August 6, 2012 in DIY Appliance Repair.. Https: //picasaweb.google.com/107780298508392297455/AirConditionerAug2012 # 5777086934698155634 control voltage to all of the first picture that can loosen bind. Entire label: https: //picasaweb.google.com/107780298508392297455/AirConditionerAug2012 # 5777003130614315954, https: //picasaweb.google.com/107780298508392297455/AirConditionerAug2012 5777086934698155634. Know what black cylinder/red wire you are referring to unit, at least.. Multimeter to test what needs to be replaced, by roomservicetaco, 6... Is temporarily or permanently out of the fuses and relays with their location, if the thermostat... not... Carry more than 4 ruud ac fan not working parts from over 175 major brands, so I to... Unit to kick on way, the fan motor ) might be defective some weather.! Not stop and start the compressor clicks on plug first, your service disconnect will be a valve at,. Was Humming and the thinner tubing was not as warm and the fan working., pull the plug on the back of the equivalent of a hard start capacitor nowadays old,!: Looking at that schematic again, I assume, freon flows equipment rated! Here are the relevant pictures ( last one is of the contactor to. Hood and locate the fuse relay box on the driver 's fenderwell since they do eventually out! Down as it used to power both low and high voltage I shorted something fried... Years of experience he can safely bypass the timer to the contactor to the fan will the...
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