Question about Ruud Central System Air Conditioner

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Outside condensor was coming on but not cooling, checked freon levels , all good, replaced contactor, problem resolved but intermittantly when calling for cool. unit will come on but does not seem to cool.

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  • gooseington Jul 24, 2009

    low side was 60, high was 200, temp was 85

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Did u check pressure at the low side when compressor is on and what is the measurement what is the pressure for the high side

Posted on Jul 24, 2009

  • Ottoniel Jul 24, 2009

    this measurements where done with the compressor working. Evaporator is working, blower wheels working or turning in the correct direction, coil is clean

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Why does lenox heat pump not heat in normal heat mode?


The thermostat is not a heat pump thermostat or it is not wired or set up correctly.

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Does not cool


CHECK FREON LEVEL...IF GOOD CHECK FOR DISCONNECTED
THERMOSTAT OR COMPRESSOR OR CONTACTOR WIRE AT OUTDOOR UNIT WITH POWER OFF. CHECK FOR A BLOWN CAPACITOR OR UNIT GROUNDED OR BURNT WIRE. BAD BREAKER OR SEE IF OUTDOOR FAN COMES ON AND COMPRESSOR KICKS IN ( MAKES WHIRRING NOISE ) .

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Apr 09, 2010 | Heating & Cooling

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For my thesis: 5 condenser problems and 5 solutions


Problem number one.

condenser fan won't come on. solution check the capacitor if good ohm out the fan to see if it is bad. If bad replace fan motor with new one.

2. compressor will not come on. solution check the contactor to see if engaging this applies to problem 1 also. If engages check the capacitor on the herm side if it is bad replace. If good check compressor to see if the compressor is bad. Should it be bad replace compressor.

3. High head pressure not cooling properly dirty condenser coils. Clean coils. With hose and water.

4. Low head pressure frosting accruing on suction line. Check freon levels. Also check inside air filter for being dirty.

5. Condenser unit is failing to come on. solution check the power source check the contactor should the main power be bad check main breaker and replace any slow blow fuses that are bad. Should the contactor be bad check transformer to ensure 24 volts going to secondary side on contactor. Inspect the two wire going to outside unit condenser. replace any broken wire any bad transformer or bad contactor.

Feb 21, 2010 | Carrier 38CKC042 Air Conditioner

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Inside strip of fridge is very hot. cleaned out behind fridge and the coils, etc. fan is barely moving/not moving. any suggestions???


Replace the fan. The strip has a freon line running behind it, and when it is hot, this tells us that you have a dirty condensor, bad condensor fan motor, bad evaporator fan motor, defrost problem, or a freon system problem. When you say your fan is barely moving, I am assuming this is your condensor fan motor, which sucks air through the hot freon lines in the condensor coils, and cools the freon off. If it is barely moving, it can't cool the freon. In some brands a slow moving condensor fan can be caused by a bad main control board. Good Luck, Appliance Specialists

Jan 28, 2010 | Refrigerators

1 Answer

Outside unit runs continuously, even when system is off.


On A/C units, there is a low voltage line that leads to a contactor, which engages to close the high voltage circuit to the condensor unit. Over time, the accual contacts in the contactor can weld themselves together. Try shutting off your furnace breaker but leaving on the one for the outside condensor unit. If it still runs, your contactor probably needs replaced. Contact a licensed electrician or HVAC contractor and tell them you think your contactor is in need of replacement. Is a fairly simple and quick replace, but the contactor itself is not cheap.

Oct 10, 2009 | Ruud Central System Air Conditioner

1 Answer

Earlier this week, I noticed that the house felt "stuffy" but the thermostat showed everything to be cooling as expected. Last night, the house was definitely warmer than expected when we got home. My...


nope, nope, sounds like a stuck contactor in the electrical compartment of the condenser, but there are actually several things that could cause it.

Sep 30, 2009 | Heating & Cooling

1 Answer

Evaporator comes on, but the condensor unit does'nt.


Have u checked at the compressor unit. There is a contactor than energizes the compressor is this contactor getting supply when u turn on the evaporator this contactor get energized see if this happens. If this is energized and you are getting supply to the compressor and compressor doesn't turn on 1.) compressor has thermal protection this might be faulty 2.) or the compressor has too much freon 3.) check if the windings of the compressor motor are not short to ground

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Check and see if it is froze up. Check big line at outside unit for ice. check filter and replace as needed. Check outside fan to see if it is running. Wash out outside coil If fan and compressor are running and has hot small line at outside unit. If not froze up and coil is clean you will need to call in a pro. If compress over heated you may need to wait for it to restart if coil was dirty. Again make sure out door fan and or unit is running and clean.

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Replace Contactor Relay on Rheem Air Condenser


I have a Rheem heat pump/airconditioner, Mod # RPFA-036JAS, that I have had problems with for at least 5 years and have paid over $1,000 in parts and service calls. I can vever recreate the problem when a tech is here. It usually happens in the middle of the night. I hear a Click, ckick, click sound, through the unit and it sounds like it is comming out of my air handler, but the outside unit also clicks at the contactor and the condensor cooling fan moter will start and stop about every half secongd or second. Both contactors have been replaced, the small one twice, one capaciter
has been replaced. I allow the unit too cool down and its alright for a few hours. That is difficult when the outside temp is below zero. HELP PLEASE!

Feb 16, 2009 | Heating & Cooling

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