Question about Dometic Rooftop RV Air Conditioner

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Roof top a/c freezing up.

What is the best way to clean the coils and fan?

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I use oven cleaner on outside thoroughly rinse with water carefull not to bend fins inside they sell evaporator cleaner! good luck!!!

Posted on Jun 21, 2009

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Why doesn't my Frigidaire FRT21TNG freeze or cool fresh section?


Good Afternoon Friend,

I understand that your Frigidaire refrigerator, model# FRT21TNG, is not freezing or cooling. I also see that the coils are not freezing, the drain line and everything cleaned, and that the capacitor was replaced. From this point, I suggest contacting your local authorized technician. They will be able to diagnose your appliance and determine why it will not cool as it should. Hope this is helpful.

-Best Regards-
WP

Jun 20, 2014 | Frigidaire FRS3R5EMB Side by Side...

1 Answer

Why is air conditioner freezing up


Hi Krystal. Not sure how old your AC is. But mine is 1988 Class C. My roof mount started today freezing up After being on only 1/2 hour or less.I took the cover off AC on roof and seen the cooling coil half full of ice building up. When It get fully packed with ice the inside air cannot pass thru coil to fan to recycle the cooled air back down inside RV.. I checked out this site.Fixya.It seems my AC may be blocked with dust in the cooling coil. So I cleaned it out with compressed air. You can buy a can of it in spray form at Wal-Mart.$5..Also FixYa suggested to change the air filters after you clean the coils. Take off cover in inside on ceiling and put new filters. Peferable ones that are able to breathe thru easly. Mine was pluged with dog dander and a bit of dog hair.. I may have to put my dog..in a bag...No I can't do that... But today and yesteday it was very hot and ******* the AC.. But I did attach a small fan under my AC to push more hot up into coils.. It did make a diference The coils started to thaw and drip water on roof.. But I still have to check freon pressure...I'm attaching a photo of my small fan It is only 5"across...Hoped that helped a little.......John, Cornwall, Ontario
7_7_2012_10_38_25_pm.jpg7_7_2012_10_39_02_pm.jpg7_7_2012_10_40_14_pm.jpg

Jul 03, 2012 | Coleman Mach 15 Air Conditioner

1 Answer

I have a trailer with a duo therm ac..the outside fan is coming on but nothing is blowing thru the registars


Not sure where your located, so check that unit didn't freeze up on you. Make sure evaporator and condenser coils/fins are clean and run on fan only to aid in thawing them out. Once you see condensation running off roof good, try using cool again and see what happens. When they freeze up, airflow gets restricted through unit. The outside fan and blower wheel for forced air inside are attached to same motor, so if fan is working, blower wheel should be turning as well unless it is broken, or allen key has come loose on clamp around center of blower wheel. Other possibility is that the blower wheel is turning but forced air ducts have blockage at inlet, which will require letting ceiling assembly down to inspect, or removing cover on roof and screws at front evaporator and opening it up. Make sure power is off during inspection.

Sep 12, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

KITCHENAID REFRIGERATOR MOD# KTRP22E KEEPS FREEZING UP. THAW IT OUT AND IT WORKS GOOD FOR ABOUT 4-5 DAYS THEN STARTS FREEZING UP AGAIN.


Hi,
This is a common defrost problem, The ice
is not being melted by the defrost system. he fan can't blow into ref.
Take out back panel of freezer to check for icw build up. The coils should be clean.
There are three components to a defrost system- a heater,heater thermostat, and a timer unless you have a defrost electronic card.
Its best handled by a Technician but you could possibly do it by taking your model number to the nearest appliance parts store and asking for the parts. They are mostly located in freezer ,behind back panel on freezer coils.except the card which is usually located in ref The parts store will have info
Also check evaporator fan in freezer
Also check fan undernearh Ref in the rear
Clean condenser coils underneath
If this was helpful please rate me
Thanks for using fixya
Leo Ponder
imufo2

Jul 23, 2011 | KitchenAid KTRP22EM Top Freezer...

1 Answer

My coils inside of my Dometic roof top ac keep freezing up. How do I clean it? Thanks John


You can buy some coil cleaner at a heating and air supply. There are several brands. Some have to be rinsed off others don't. Use the kind that doesn't have to be rinsed on the evaporator coil.

Aug 18, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Refrigerator is cold, freezer not freezing


Amana refrig have 2 main problems . 1 is the defrost bimetal ( 1" cylinder at the top right on the freezer coils with 2 wires ) and the other is a refrigerant leak where the copper tubing joins the aluminum tubing at the freezer coils ( evaporator coils ) . If your freezer fan is not working and you have frost on the freezer coils then replace the bimetal as this also controls the defrost heater ( defrost thermostat ) . If you have no frost on the coils ( for both checks , you will have to remove the inside rear freezer panel , maybe 12 screws ) , then a refrigerant leak has happened and the best solution would be to replace the refrig .

Jul 18, 2010 | Amana 22.6 cu. ft. Side-By-Side...

1 Answer

Not cooling


check the and see if the condenser fan is running. you will find it if you take the top off also check and see if the condenser coil is clean. if it is dirty or the fan under the top is not running it will cause the compressor to short cycle on limits or overload.

May 29, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Roof top a/c is freezing up what can be done?


Check the refrigerant charge. A low charge will cause it to freeze up. May need to have some added. Also check for dirty air filters and make sure the evaporator coil is clean. A restricted airflow will cause it to freeze up also because the air isn't transferring heat in the evaporator. Let me know if this helps.

May 20, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a dometic Roof Top Rv Air Condtioner and the evaporator coil is freezing up. Could the unit be low on freon. I also noticed the evaporator coil had a noticable amount of dust build up. My thought...


It freezes because of a lack of air flow ... and/or ... colmplicating ... high demand with high humidity.

Even worse is running the roof top with the door open in the summer (I see this all the time in the RV park where I work - I'm not saying you are doing this - but I see it all the time. What the heck, the typical transient camper is not paying for the electricity - let it run!)

I hope this helps you

thanks for your interest in FixYa.com

a

Dec 11, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Large office air conditioner


Shut off the cooling and leave the fan in the on position. If the A/C cooling coil is frozen over it will stop air circulation. After you shut the cooling off look down through the fan on the roof top unit and look for any sign of ice on the big line going to the compressor. This would be a sign of the frozen A/C coil. After about an hour or so you should start to feel air movement.

To prevent the coil from freezing up operate the fan in the on position while the air conditioning system is in the A/C mode. Not automatic.

Jul 10, 2008 | Heating & Cooling

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