Hey team,
I have been working on this A/C issue for 30 days plus days now, thought I had it fixed, but has reemerged. Thanks for all the help along the way on the forum threads, but think I am missing something simple, so close to the problem can't see it, so here we go, maybe you can help, below is my saga.
Problem: A/C will not cycle on despite having good power to an operational compressor. Fan, heat pump, and furnace all work just fine.
Equipment:
- 2009 27FB International Ocean Breeze
- 1 AC/HP Unit: Dometic Model 630516.331D
- Duo Therm 5 button CCC thermostat with one Zone installed.
- 2 Honda EU2000i and Companion Generators
Timeline:
14 July 13: while dry camping in Colorado turned on microwave with a/c on, created a surge. When resetting the system, everything worked minus the a/c. Fan, heat pump and furnace operational. Weather cool enough in Colorado not really an issue. Thought it was a generator problem, waited to troubleshoot on SURE power.
28 Dec 13: While connected to SURE power in Pensacola, FL troubleshot system again. Discovered on forum how to reset system through thermostat, received an FF code, still same issue, no a/c, but heat pump, fan, and furnace work like a charm. December in FL, not an issue, btw, discovered serious water damage to floor through bumper, go figure.
5 Jan 14: Turned in our OB for water damage repair in Dallas TX along with a/c fault. No action from repair shop for six months.
23 Jun 14: Decided to repair floor ourselves rather than lose airstream for entire summer, completed repair, gained confidence, took on A/C repair. What I have done so far:
1. Confirmed good power to Control Board, Capacitors, and Compressor.
2. Confirmed both of capacitors (Start and Run) are operational.
3. Confirmed 3 Amp fuse is operational.
4. Pulled both the Control Board and Thermostat Boards, took pictures, sent to an electrician, said both looked good to him. Used JustAnswer.com, this guy rocked worked with me to confirm I was using my voltmeter correctly at all locations and my compressor was fine. "If heat pump is working your compressor is fine"
5. Electrician was convinced it was potentially a short between control board and thermostat. "Check your entire system"
6. Checked entire system, bathroom fan not operational (slow turn), replaced. Still no a/c coming on.
7. Power 3000 hitch, blown control switch, replaced. Still no a/c coming on.
8. Inspected Duo Therm RJ 11 terminals and line, no issues.
9. Everything else was working fine, excellent power distribution throughout the system both AC and DC.
10. Installed a new hard start capacitor just because I was getting desperate. Used the recommended one from RV Mods, RV Modifications, RV Upgrades, RV Tips, RV eBooks | ModMyRV.com, Supco SPP6E A/C hard start capacitor. Fit was a little tight. Tested power, still no a/c coming on.
11. 10 July 2014: Time to gamble, so I ordered and replaced thermostat, touchdown!! A/C powered on!! Hallelujah!!
12: 14-28 July: Traveled to GA and FL, used a mixture of SURE and Generator power along during trip, A/C worked beautifully.
13. 29 July: Pulled into a Walmart for the night, no a/c. Heat Pump, fan, furnace all work. Reset system through thermostat, FF. No a/c. Worked fine that same afternoon at a beach in FL on Generator power.
14. 30 July: Got home, called Dometic, (felt like an idiot, should have called them at the beginning, customer at Camping World said they were great to work with) Dometic tech recommended that I replace the Control Board, ordered, received and did so yesterday, no joy.
Any ideas? I feel like I am at the end here, the Dometic tech said I may need to replace entire unit, really? Everything on the unit works. The brain has a tick, it just not telling the body to do something. I feel like its tied to the thermostat? Is there some sensor not working? Why did a new one temporarily fix the problem.
Thanks for any help!
BTW we are putting a video together on “how to repair the water damaged floor and properly seal your airstream” without removing the skin. It tooks us about ten days to do the work, we installed a cork floor throughout the entire airstream and tiled the bathroom. It was hoot!
KGIII
I have been working on this A/C issue for 30 days plus days now, thought I had it fixed, but has reemerged. Thanks for all the help along the way on the forum threads, but think I am missing something simple, so close to the problem can't see it, so here we go, maybe you can help, below is my saga.
Problem: A/C will not cycle on despite having good power to an operational compressor. Fan, heat pump, and furnace all work just fine.
Equipment:
- 2009 27FB International Ocean Breeze
- 1 AC/HP Unit: Dometic Model 630516.331D
- Duo Therm 5 button CCC thermostat with one Zone installed.
- 2 Honda EU2000i and Companion Generators
Timeline:
14 July 13: while dry camping in Colorado turned on microwave with a/c on, created a surge. When resetting the system, everything worked minus the a/c. Fan, heat pump and furnace operational. Weather cool enough in Colorado not really an issue. Thought it was a generator problem, waited to troubleshoot on SURE power.
28 Dec 13: While connected to SURE power in Pensacola, FL troubleshot system again. Discovered on forum how to reset system through thermostat, received an FF code, still same issue, no a/c, but heat pump, fan, and furnace work like a charm. December in FL, not an issue, btw, discovered serious water damage to floor through bumper, go figure.
5 Jan 14: Turned in our OB for water damage repair in Dallas TX along with a/c fault. No action from repair shop for six months.
23 Jun 14: Decided to repair floor ourselves rather than lose airstream for entire summer, completed repair, gained confidence, took on A/C repair. What I have done so far:
1. Confirmed good power to Control Board, Capacitors, and Compressor.
2. Confirmed both of capacitors (Start and Run) are operational.
3. Confirmed 3 Amp fuse is operational.
4. Pulled both the Control Board and Thermostat Boards, took pictures, sent to an electrician, said both looked good to him. Used JustAnswer.com, this guy rocked worked with me to confirm I was using my voltmeter correctly at all locations and my compressor was fine. "If heat pump is working your compressor is fine"
5. Electrician was convinced it was potentially a short between control board and thermostat. "Check your entire system"
6. Checked entire system, bathroom fan not operational (slow turn), replaced. Still no a/c coming on.
7. Power 3000 hitch, blown control switch, replaced. Still no a/c coming on.
8. Inspected Duo Therm RJ 11 terminals and line, no issues.
9. Everything else was working fine, excellent power distribution throughout the system both AC and DC.
10. Installed a new hard start capacitor just because I was getting desperate. Used the recommended one from RV Mods, RV Modifications, RV Upgrades, RV Tips, RV eBooks | ModMyRV.com, Supco SPP6E A/C hard start capacitor. Fit was a little tight. Tested power, still no a/c coming on.
11. 10 July 2014: Time to gamble, so I ordered and replaced thermostat, touchdown!! A/C powered on!! Hallelujah!!
12: 14-28 July: Traveled to GA and FL, used a mixture of SURE and Generator power along during trip, A/C worked beautifully.
13. 29 July: Pulled into a Walmart for the night, no a/c. Heat Pump, fan, furnace all work. Reset system through thermostat, FF. No a/c. Worked fine that same afternoon at a beach in FL on Generator power.
14. 30 July: Got home, called Dometic, (felt like an idiot, should have called them at the beginning, customer at Camping World said they were great to work with) Dometic tech recommended that I replace the Control Board, ordered, received and did so yesterday, no joy.
Any ideas? I feel like I am at the end here, the Dometic tech said I may need to replace entire unit, really? Everything on the unit works. The brain has a tick, it just not telling the body to do something. I feel like its tied to the thermostat? Is there some sensor not working? Why did a new one temporarily fix the problem.
Thanks for any help!
BTW we are putting a video together on “how to repair the water damaged floor and properly seal your airstream” without removing the skin. It tooks us about ten days to do the work, we installed a cork floor throughout the entire airstream and tiled the bathroom. It was hoot!
KGIII
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