Having problems with your Air Conditioners ?

Dometic duo-therm I have a motorhome with 2 a/c and the ccc. One is working well but does not keep temp. To operate you have to manually turn off and on. The rear unit the fan comes on but the compressor doesn't. I pulled the cover but I don't know how to check the capacitors or other various items.


Answers :

The first unit sounds like the indoor and outdoor coils need a good cleaning especially if its an older unit. The second unit sounds like the compressor is bad. Can you do an ohms test on each of the leads to the compressor to see if it is bad? If you can then you will know. Otherwise, I would recommend having it serviced by a professional.

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Dometic duo-therm I have a motorhome with 2 a/c and the ccc. One is working well but does not keep temp. To operate you have to manually turn off and on. The rear unit the fan comes on but the compressor doesn't. I pulled the cover but I don't know how to check the capacitors or other various items.


The first unit sounds like the indoor and outdoor coils need a good cleaning especially if its an older unit. The second unit sounds like the compressor is bad. Can you do an ohms test on each of the leads to the compressor to see if it is bad? If ... Dometic Rooftop RV Air Conditioner

We live in southwest Florida. Our HVAC system consists of a air conditioning system with heating coils when it is cool. Yesterday morning we tried the heat nothing come on. Later in the day I tried the air nothing. I tried turning in just the fan nothing. I just checked the breaker I have power where the wires are connected. I went out to the outside unit and pulled the cover. Pushed in a spring loaded plastic switch the fan on outside unit works and shut off when I released the switch. But noth


Hello. Sounds like you do have power. That spring loaded plastic switch is a 24v contactor. It pulls in when energized. If you push it in manually everything shoud run normal. Ck your 24v transformer. On one side (feed) you should have 115v or 220v ... Air Conditioners

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There will be option in remote to on the fan and compressor separately may be you would not have on-ed the compressor through remote or else there would have been any loose connection in the wire which connects the compressor ... Friedrich Air Conditioners

I have the MR36TQY3f outdoor unit with 2 MW09Y3FM units and 1 MW12Y3FM indoor units! The MW12.. works great and one of the MW9... works great! When I run the 2nd MW9 only (other MW9 & MW12 off)..... the outdoor unit compressor or fan does not come on! If I run all units then ... compressor kicks on runs great, fan runs... lines get cold on the 2 good units ... nothing on 3rd unit... then I turn 2 good units off....and it sounds like the compressor kicks off and the fan will continue to run reall


After looking at the manual for the units, I believe that the system is having trouble with the number of units that you have linked. Here is a portion of the manual about multi system operation>Also link to manual:http://www.fri ... Friedrich MR36TQY3F Split System Air Conditioner

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... Goodman Air Conditioners

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It sounds like the compressor needs starting components installed on it. All a/c units have a run capacitor for the compressor and another one for the condenser fan motor. These motors use these capacitors all the time when the motor is running. H ... Air Conditioners

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... Whirlpool Air Conditioners

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Make sure the fan turns freely. No obstructions or bad bearing. And check the capacitor ... Frigidaire Air Conditioners

Goodman a/c j41 fan not running, turned off and on at fuse box, took a look at the box next to a/c unit and opened the box on the wall and pulled the plug and pulled the plastic panel off, there is no fuses. So i put back together and turned the a/c unit on, now at thermostat the snowflake is no longer flashing, some cold air coming out of vents, but outside a/c unit fan still does not run.


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Hi,\015\012\015\012If you can safely check the supply to the motor when it should be on, then this is the best method to check it.\015\012\015\012Check the fan turns very freely - oil the bearings if it doesn't.\015\012 ... Goodman Air Conditioners

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The bulge is a telltale sign of a defective capacitor along with the tripped breaker. Replace it and cross your fingers. ... Carrier 38CKC036 Air Conditioner

EMERSON FAN MOTOR WHICH HAS A BLK WIRE PURPLE WIRE AND A BROWN WIRE WENT DEAD. SO I BOUGHT A NEW FAN EMERSON CAME WITH 4 WIRES BLK ,WHITH, BR AND BRW AND BRW WITH WHITE STRIPE. I WIRED IT BLK TO THE CONTACTOR WHITE TO THE COMM THE YELLOW FROM COMPRESSOR TO THE HERM BRW TO THE FAN BRW WITH WHITE STRIPE TO THE COMM THERE IS A RED WIRE GOING FROM THE COM TO THE CONTACTOR WHEN I TURN THE AC UNIT THE COMPRESSOR COMES ON PUT FAN DOES NOT ?????


The two brown wires go to the fans capacitor. The capacitor should always be changed with the fan motor.\015\012\015\012It sounds like your unit has a dual capacitor. One side for the fan and the other for the compressor. All you will be ... Dometic Rooftop RV Air Conditioner

I have a comfortmaker unit with heat strips. The blower fan comes in and blows cool air. I have checked voltage at the transformer, and it is producing 24 vac. The contactor for the fan and condenser never pull in so I replaced the defrost control circuit board. Still only blows cool air and the defrost cycle never comes on. I jump 24vac to the coil on contactor and the defrost fan came on and the condenser came on so the fan motor and start/run capacitor are good. Any suggestions.


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My air conditional unit outside ,fans turns on but the unit compressor wont turn on,just stopped working this morning.i turned the thermostat to 72 but only the fan on the outside unit comes on and it is hot inside the house..


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You amy ahave a bvad capacitor on the outside unit. It starts the fan and the compressor. You can change this yourself. Open the outside panel and you will see a silver canister with terminals out the top. Replace this and I think your problem will g ... Goodman CKL24AR24 Air Conditioner

A/C worked fine last year. Turned it on for the first time this year and the outside unit does not come on. The inside unit fan works just fine. I checked the circut breaker and turned on and off. No change. I revoved the cover and do not see any burnt wires or any problem. Not sure what to do next. I have a meter... what should the voltage be where the power comes into the unit at L1 ect. please help... thx


Check and see if you have 24volts at the contactor outside.if you do you have a bad contactor. if you don't take the tstat off the wall and take a jumper wire and jump out R to Y on the t-stat if i ... Air Conditioners

The outside unit keeps tripping the breaker. It will run for a few seconds, loud rumble, then stops, and does this for about five minutes before tripping the breaker. I just bought the house. The unit is about 8 yrs old. I pulled off the cover and the inside near the compressor is full of dirt. We had a bad storm with lighting the night the unit started acting up. Should I replace the capacitor or is my compressor bad?


There is a process to go thru for checking the unit to see which part is causing the problem. first thing, listen to the compressor when it first tries to start. if the compressor does nothing and the breaker trips then you will have to check the com ... Ruud UBHC Air Conditioner

My AC My Compressor keeps kicking off. I turn the unit on, the fan works. The Heat works but the compressor turns in about 60 sec. If I unplug the unit and turn it back on, it comes on but the compressor shuts off again after 60 sec. Can this be from dirt in the coils? They have some build up. Any other causes?


One might think so, YES the compressor is running till it gets hot and tripps on hi-temperature, and after it cools down awhile, the switch willcautomatically reset itself and back- & forth......Thank-you-very much! ... GE Zoneline AZ38H12DAD Split System Air Conditioner

1996 Coleman Model 7333C8876. Have 2 units on our Motor Home one day it was hot so I had both units running controlled by a Electronic Climate Control system. It got cool in the evening so I turned them off. The next day when i fired them both up on high the rear was fine. But the front will only cool on Low. The fan will not run on high and you can hear a slight noise coming from the unit. But the fan will not run on high.


Check to make sure the drain tube is clear. It sounds like the blower fan is dragging in water buil-up. ... Air Conditioners

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