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07-23-2016, 07:40 PM
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#1
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Junior Member
Join Date: Oct 2015
Posts: 12
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AC inop
What is the fix: My 2014 Tiffin 33AA RED has two AC units(heat pumps). I arrived at our reserved RV camp site and plugged into the 50AMP system. The ACs, which were operating perfectly earlier in the day, started up but blew hot air only. I checked the onboard breakers and recycled them - same hot air result. Any other ideas???
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07-23-2016, 08:20 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,957
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I have read of occasions you experience, and a "sometimes" fix is to switch between heat and cool several times. This supposedly can cause a stuck reversing valve to operate again.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-24-2016, 05:56 AM
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#3
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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AC inop
If both where working and both quit at the same time odds are something in thermostat also there is a time delay on compressors if you cut them on and off.
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2007 Fleetwood Revolution LE 40V
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07-27-2016, 06:39 AM
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#4
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Senior Member
Winnebago Owners Club Ford Super Duty Owner
Join Date: Aug 2004
Location: Oregon
Posts: 2,731
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Were you running them on the generator when you plugged in shore power and then suddenly just shut off your generator? If so turn on the generator and let it run the MH for a bit and see if the AC's start working again. IF they do then your issue is in the ABT Switch. You are not actually getting 50amps to the MH. The other issue could be with the shore Power. So you have a monitor board that lets you know what the incoming power is, ie 30, 50 gen? Check it out and see what it tells you?
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Retired Navy Submariner
2014 Itasca Sunstar 35F; 5 Star tuned; 2014 Jeep Cherokee TrailHawk
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07-27-2016, 07:13 AM
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#5
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 14,602
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We had the same problem several years ago. Moved to a different site and the front AC would only blow hot air. The fan would start, wait for the appropriate period of time, and then the compressor would kick in BUT only blew hot air.
I climbed on the roof, pulled the shroud off the AC unit with intentions of checking the reversing solenoid. First thing I saw was that the wire going to the solenoid had moved and came in contact with the copper tubing and melting the insulation and arced. I cleaned up the wire, put back together with a butt splice, tapped everything up and secured the wire out of the way. Tested the AC unit and it worked fine.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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07-27-2016, 07:40 AM
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#6
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 5,932
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Quote:
Originally Posted by fshipton
What is the fix: My 2014 Tiffin 33AA RED has two AC units(heat pumps). I arrived at our reserved RV camp site and plugged into the 50AMP system. The ACs, which were operating perfectly earlier in the day, started up but blew hot air only. I checked the onboard breakers and recycled them - same hot air result. Any other ideas???
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You DO NOT have a AC problem. The chances of both AC.s going out at the same time are in the billions. The most likely is a voltage problem. Either the changeover box or the park power. Start with resetting the breakers on the power poll. Next check the incoming power at the plug. Then check the changeover box. Last check the salesman switch.
__________________
1998 Pace Arrow 35 ft. F53 Ford V10 2014 Honda CRV toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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08-03-2016, 04:52 PM
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#7
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Senior Member
Join Date: Apr 2012
Posts: 573
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Cycle the 12 volt power ( battery switch ) while power is off. Most likely that will fix it. Ive seen it happen.
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2015 Winnebago Tour 42QD
Cummins 8.9 ISL 450
Freightliner XCL W/IFS
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08-06-2016, 08:29 PM
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#8
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Senior Member
Tiffin Owners Club Appalachian Campers Mid Atlantic Campers Coastal Campers Freightliner Owners Club
Join Date: Jan 2015
Posts: 1,622
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I would suspect a low voltage condition or open neutral, either of which can damage your AC's. If the voltage gets low, they will try to compensate by pulling more current.
Get yourself a Progressive Industries Surge Protector which if it detects low voltage (open neutrals or other error conditions). It will shut down and prevent your coach from being impacted by bad power.
Either the 50 amp hardwired, or portable.
Progressive Industries RV Surge and Electrical Protection industry lea
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DaveB, Raleigh, NC
2015 Tiffin RED 33AA, w/Honda CRV
VMSpc, Magnum BMK/ARC50
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