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A/C unit air handler comes on inside but outside compressor does not come on. The contacts are not working. If I hold down the contacts the compressor comes on and unit works.

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Check and find out if you have 24 volts across the terminals for the coil of the contactor. If you have 24 volts across the terminals and the contactor does not pull in change the contactor with one of the same ratting. If you do not have 24 volts across the terminals for the contactor coil your problem in in the 24 volt circuit. Possible that the thermostat is not sending power to the contactor through the "Y" terminal.

Posted on Jul 21, 2008

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2 Answers

Can not blowing as hard as it should. Compressor kicking on but freezing up easily. Any ideas?


Check your filters and make sure that there is adequate airflow, also make sure that any drain tubes are not plugged.

Jul 03, 2015 | Air Conditioners

1 Answer

My air handler fan does not come on, the outside unit turns on fine. Is their a way to reset the fan?


Check for fan operation by turning the fan control at the thermostat to "on". If the fan blows, it works. If not, check a circuit breaker or fuse.

If the fan blows when forcing it on with the thermostat but not in automatic, check the fan control circuit in the air handler. Danger: high voltage, beware! There should be a system wiring diagram inside the air handler somewhere.

Mar 30, 2014 | Rheem 4 Ton Air Handler - RHLLHM4821JA

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Heat pump problems


Some heat pumps have high and low pressure swiches installed to keep compressor from running when unsafe conditions occur that can damage the compressor. If the outside fan is not turing on, the unit is cycling on high pressure, if you see ice forming on the big refrigerant line coming from the air handler, then the compressor is shutting down on low pressure. Low pressure can be cause by lack of air flow through air handler or from a low refrigerant charge.

Feb 13, 2014 | Intertherm Air Conditioners

2 Answers

My outside A/C unit is not coming on


might be it is relay problem in pcb. Pls check the cord then relay by a technician,

Oct 14, 2013 | Goodman Air Conditioners

1 Answer

Were is the reset button on the unit?


Hi, here is the theory on the reset button on Air Conditioners. They reset via the breaker panel box in your house. Check that first before anything else. However if your unit is popping breakers, it is because the rating for the breaker is incorrect, or there is something that needs servicing usually in the outside unit called the condenser. That piece contains the compressor. A faulty compressor and pop the breaker. Or If the condenser fan that blows over the coils of the outside unit stops (common failure) The compressor will overheat and shut down. That may not trip the breaker but the house will get hot anyway. Usual action for this is to replace the condenser fan motor and starting capacitor. Make sure the speed rating and directional rotation for the replacement motor is the same as the motor removed.
There are other reasons why the system won't come one fully. If the wall thermostat is digital and does nothing. including turning on the fan. There will be a small fuse located on the circuit board of the air handler (part of Air Conditioner mounted inside the house. It houses the circulation fan). That fuse could be blown. That one shuts down just about everything.
On air handlers mounted up into the attic crawl space there is an overflow pan. This pan is mounted directly below the air handler. This pan can fill with water when the drain pain contained inside the air handler starts to overflow because the drain system to that is clogged.
There is a "float switch" mounted in the overflow pan wired to the system in such as way as to shut down the entire AC system if that pan fills.
The handling is to clear the obstruction in the Drip Pan inside the air handler. Then remove enough water from the overflow pan and the AC will run as though nothing has happened.
If you have more questions, write to me on this site.
One thing more. The capacitor alone in the Outside condenser unit can fail and that will stop the condenser completely if it is of a "split" design and used for both the compressor and fan. When replacing this unit alone, ALWAYS find the same specification part.
I hope this helps,
Have a Happy New Year,
Mark

Jan 02, 2011 | Goodman CLJ30AR32 Air Conditioner

1 Answer

Hi, After finding out that Freon is low by seeing snow/icy surface on outside compressor, I went up in the attic to find snowy/Icy surface all over the coil inside the air handler. I wahsed it and made...


Hello
Your still froze up.There is a freeze cutoff device in the air handler upstairs.
Look for a thin silver color tube near the coil and follow it to the control box,there may be a reset button.If not, try using a hair dryer to warm up the coil and it should reset itsself.
These freeze devices can take an hour to reset on there own sometimes,do not run the compressor while doing this.

Aug 30, 2010 | Ruud Air Conditioners

2 Answers

My A/C turned off. Still blowing air around. Hot air. Outside the A/C itself is not on. Any ideas???


if you open the bottom panel of your furnace you will find the controll board there will be 4 wires coming back from the thermostat and 2 going to the a/c the 24 volt hot wire for the a/c will be hook to the yellow wire coming back from the thermostat take them off the board and wire nut them together this will do the trick in many cases

Aug 26, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Goodman a/c unit outside not coming on. buzzing


Sounds like compressor is bad...taken out by a bad contactor.

Aug 17, 2009 | Air Conditioners

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