Question about Dometic Rooftop RV Air Conditioner

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Reset switch inside the ac handler kicks out everytime i reset it

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That a common problem on a RV 2things open the system an check the run compasitor to the unit look an see ifs its buldge out or swelling .second is the bad news the compressor could be grouned to cases ,so check those things an ...

Posted on May 16, 2010

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Posted on Jan 02, 2017

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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

1 Answer

The condenser unit will not kick on...it is a concord unit,10=12 years old,13 seer,3 ton. The air handler works fine. I thought it was the capacitor. The old one was bad,I verified that with multimeter....


It could be a low refrigerant cut-out (switch), grounded or shorted motor windings, open internal winding overload protector (check at the common winding), a broken conductor, or no power at condensing unit from blown fuses or open/tripped breaker.

Aug 22, 2013 | Intertherm Heating & Cooling

2 Answers

New A/C Unit makes loud noise when it starts up


It shouldn't be too loud. You don't explain where the noise is coming from? The air handler/furnace or the outdoor unit.

Jun 13, 2013 | Heating & Cooling

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

2 Answers

I have a T3BA-036KA the outside unit will not


You need 24 volts going to the coil of the contactor. If you do not have 24 volts, you will need to trace the wiring back to see where you are losing it from. Try placing your voltmeter at C & Y coming from your air handler. If not, go to your air handler and test for 24 volts ac at C & Y coming from your thermostat. If you do not have 24 volts coming from your thermostat, there is either a problem with the thermostat or there is a problem with the wiring between the thermostat and the air handler. If you have 24 volts at the air handler coming from the thermostat but you do not have 24 volts at the outdoor unit coming from the air handler, then you have a problem with the wires between the air handler and the outdoor unit.

I hope you find this information to be very helpful to you moving forward. Please leave a rating. :-)

May 10, 2010 | Intertherm P3RA-036K Air Conditioner

2 Answers

Trane XT300 thermostat reads HOLD-AC. Unit will


by simply turning power off to furnace or air handler may not work but there might be a reset button in the t-stat. remove the faceplate off of the t-stat it might be in their.

Aug 16, 2009 | Heating & Cooling

1 Answer

AC won't start


Could be a lots of things why it won't start First check the brakers for the inside snd outside units ; 2 If you have a digital thermostat ,put new batteries ; 3 Also if the drain line is clogh and there's a flood switch installed in the drain line by the air handler , it will shut of the unit (sometimes flood switch is on the drain pan inside the air handler).4There's a small fuse in the control board for the air handler. 5Also if nothing works could be a burned transformer.

Aug 14, 2009 | Heating & Cooling

1 Answer

Why is my air handler fan motor tripping the 20


sounds like fan motor is going bad - replace

Jun 15, 2009 | Heating & Cooling

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