2015 Dometic 13,500 blowing hot air, no cold. 30 amp good, 20 amp breaker good, fan good...can hear Dometic Duo Therm RV

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Customer: 2015 Dometic 13,500 blowing hot air, no cold. 30 amp good, 20 amp breaker good, fan good...can hear Dometic Duo Therm RV Air Conditioner Electronic Board Kit Control Box switch to A/C. ???
JA: Do the vents feel cold? Is there a coolant leak?
Customer: no
JA: What is the make/model of your '15 RV?
Customer: 2015 Forest River Salem 27RLSS
JA: Are you fixing your RV yourself? What have you tried so far?
Customer: myself. 30 amp good, 20 amp breaker good, fan good...can hear Dometic Duo Therm RV Air Conditioner Electronic Board Kit Control Box switch to A/C. ???
JA: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.
Customer: Just how to test and fix!
Answered by Randall in 8 mins 1 year ago
Auto Mechanic

50,982 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Good afternoon! My name is ***** ***** I am a Master Certified RV Technician and have been in this business nearly 20 years and on this site for over 11 years. I have responded to over 60,000 questions, so there is not a lot I haven't seen or heard about.

Sorry for the delay in someone getting to your question here! It has been crazy busy these last few days. I used to have an RV repair facility and worked on these systems for a living. Please give me a few minutes to type up an answer here for you. And don't be alarmed if I don't get right back to you when you respond. We work on more than one question at a time here when it is busy like it is now. I may be on a phone chat with another customer and those last less than 5 minutes. Your patience is appreciated!

Thank you for bringing your question to us here at Just Answer and I am sorry to hear that you are having a problem with your A/C.   I can assist you with this issue. Randall

If the compressor is on then chances are good that you lost the refrigerant in the system.  Take the cover off up on top of the roof and see if it is running or not.  Is so and there is no frost on the low side return line from the evaporator then it is probably leaking.  That is usually terminal since there are no charging ports.  Let me know what you find and we can go from there.  Randall

Still there? I was out at the RV
Hot on the one side...no frost on the other
I do hear a clicking on the compressor...???

Is it cycling off the overload switch?

What is the actual AC voltage out of the 20 amp Service breaker?

Where is the overload switch?

On top of the compressor under that black cap.

The rubber cap that has a nut on top?

Yes, most do.  See if the wires look burnt or the points burned.

ok. Will have to come back...need to get the BBQ going for the family now. If you're a father...Happy Fathers Day. Can I reach you tomorrow on the cell number(###) ###-####

We can have a phone chat and I will make you that offer.

Ok, back onto the A/C unit. Checked the ohms on the compressor...it's ok
Is anyone there??????????????

I called and got no answer.  Left my phone number.

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50,982 satisfied customers
Auto Mechanic
Auto Mechanic

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Steve Pearl, Mechanic's Assistant
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Last Updated: 12-20-22
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