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Old 06-14-2021, 12:49 PM   #1
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Where to get service on dash A/C?

When I bought my 2000 Holiday Rambler 38ft Diesel Class A, I only asked that they repair the dashboard A/C. That was 6 months ago and I've since moved out of state (from California to Texas).

Problem is all they did where I bought it was recharge the system and so it only worked for a month or so. Motorhome mechanics don't seem to work on dashboard air, so I took it to an automotive mechanic, who said it was fine, but just needed charging. Same thing happened. Took it to one more mechanic who said the compressor is working and he couldn't find any leaks in the hoses, so he charged it... and again it stopped working a week later.

I would like to take it to a place that can actually fix it, not just charge it up. But I can't find anyone who says they can work on it. RV mechanics say take it to a car mechanic, and car mechanics say to take it to an RV mechanic.

Does anyone know how to get the dashboard A/C serviced? My guess is there's a leak in one of the hoses since it always works for a while. But I just need to know where to take it for repair? Thanks.
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Old 06-14-2021, 01:05 PM   #2
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I had a similar issue with my last MH. I took I o a good auto air conditioning shop and they were able to determine where the leak was. They had no problem getting it repaired. You might even get one to out to you.
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Old 06-14-2021, 08:56 PM   #3
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If you want it repaired take it to Bay Diesel and A/C in Red Bay, AL. They have vast experience servicing Tiffin diesel coaches and specialize in dash a/c repair. 256-356-8830
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Old 06-14-2021, 09:11 PM   #4
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Any commercial truck repair shop will be able to handle that fix.
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Old 06-15-2021, 12:27 AM   #5
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We have our MH at NIRVC in Lewisville, TX having our dash AC rebuilt. You could call any car AC shop. Nothing different, but they need to have space to work on it. That is a challenge.

Ours ended up being a 90% rebuild of the system. Talking with a few techs that is common.
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Old 06-15-2021, 01:26 AM   #6
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they make a sealer (advance auto parts has it) but first check the Shrader valves for leaking, sometimes thats all it is... but the sealer has worked for me several times, I assume your system is 134a it's $6 a can... pretty simple to charge... and even if you have to add a can sometimes... not a huge deal... but i'd go for the sealer first
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Old 06-15-2021, 04:07 AM   #7
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I had my local auto repair shop do my 2007 Ellipse dash AC recharge.
It was pretty simple for them.
Before the recharge they checked for leaks. Fixed them and did the charge.
Most auto repair centers have that equipment.
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Old 06-15-2021, 04:41 AM   #8
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Sorry I can't suggest a repair shop near you, however a few thoughts.
Some leaks are very hard to find. Especially compressor seals that often only leak when running. A 90% rebuild is a shotgun repair. If you change all the parts you will fix the problem and the mechanic is not paying the bill. A dye test is a good start and often the mk1 eyeball works well. Look for oil stains. A nitrogen pressure test with soapy water is another. Hose leaks are usually at the end fittings.
Over the years I have been very reluctant to condem the compressor as there is no reliable way to check it. If I was to change the compressor and it still leaks I look very stupid. So good luck and I hope you find the problem quickly.
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Old 06-15-2021, 06:13 AM   #9
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I recently got my gas class A repaired at Thermo King. Turned out just low on refrigerant but they are prepared to do anything.
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Old 06-15-2021, 07:43 AM   #10
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Quote:
Originally Posted by 2cyber71 View Post
I had my local auto repair shop do my 2007 Ellipse dash AC recharge.
It was pretty simple for them.
Before the recharge they checked for leaks. Fixed them and did the charge.
Most auto repair centers have that equipment.
I've been surprised that I asked several local auto shops and all said they weren't set up to work on RVs because they weren't familiar enough with the routing of the long A/C hoses from back to front.
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Old 06-15-2021, 08:20 AM   #11
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Quote:
Originally Posted by Sonic View Post
Any commercial truck repair shop will be able to handle that fix.

x-2
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Old 06-15-2021, 08:41 AM   #12
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I've had three rvs

it requires some patience to drive it to a permanent solution
Just recharging it is a bandaid and you will continue to have problems

On my first two RVs the problems were dried out O rings at the hose fittings leaking. On one they put dye in it and finally found the compressor seal was leaking. On one the schaeder valves were leaking.

Its better to keep taking it back until they fix it permanently then you can forget about it
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Old 06-15-2021, 10:32 AM   #13
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Quote:
Originally Posted by ponytl View Post
they make a sealer (advance auto parts has it) but first check the Shrader valves for leaking, sometimes thats all it is... but the sealer has worked for me several times, I assume your system is 134a it's $6 a can... pretty simple to charge... and even if you have to add a can sometimes... not a huge deal... but i'd go for the sealer first
I can attest to sealer that works. Mind you, you need more than a typical auto a/c repair as the coach system is much longer.

I used the product Red Angel. Since I already had an oil injector I bought the liquid in a bottle...but they do sell cans with the charge hose already attached. I used 1 bottle first...no joy...but after I evacuated the system again to ensure low moisture (you can rent vacuum pumps from auto parts stores) I put in 2 more bottles...and now the leak is GONE. Testing after 6 months so far it's held.
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Old 06-18-2021, 10:23 PM   #14
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While a 30,000' view of a 90% rebuild sounds like a shotgun approach, a detailed review of how we got to a 90% rebuild does make sense.

First, talk to any trusted AC tech and they will tell you the valves commonly need to be replaced if you do most anything to the system.

Next the dryer. Same situation. Touch the system, replace the dryer.

Now we get down to what has the leak. Replace evaporator core/compressor/condensor/lines. About 6 parts if you count all the valves as 1. Not hard at all to get to 80% (Based on that framework, we are only doing an 80% rebuild.)

Now talk to that same trusted AC tech. They HATE those sealers for AC or radiators. They really mess up your system longer-term. I've never met a GOOD mechanic that will use them. If you are planning on selling the MH in a year or less, then go for it!
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