|
11-19-2018, 11:59 AM
|
#1
|
Established Member
Join Date: Apr 2017
Location: Full Timing
Posts: 13
M.O.C. #19649
|
E4 error code on Dometic Thermostat
Came back to my 3731FL to find the error code flashing. Have looked at manuals, checked the online archives and find no reference to this error. I did find the definition, as an open circuit or out of range outdoor temperature sensor. Does not appear to be stopping anything from working. Anyone else see this? How did you correct it? I'm parked south of Birmingham at the moment so have not had below freezing weather. I do not have a heat pump.
|
|
|
11-19-2018, 12:36 PM
|
#2
|
Site Team
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 1,921
M.O.C. #19755
|
You did not say what year your Montana was, I assume you have capacitive touch thermostats. Call Dometic customer support: (800) 544-4881
You could also reset it and see if the error comes back. To reset:
- With the HVAC unit off
- Touch mode and up at the same time, two dashes will appear
- Touch mode again, reset is complete
__________________
Scott & Alta
2017 Montana 3160RL, Legacy, Onan 5.5Kw, Solar
2022 F-450 Lariat Ultimate
|
|
|
11-19-2018, 03:25 PM
|
#3
|
Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,364
M.O.C. #4831
|
According to his profile, the OP has a 2018 model. I remember seeing this problem before, but darned if I can find it. I think resetting the thermostat will correct it. There is no external thermometer on a Montana so the E4 code is likely related to the thermostat having gone off the rails.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
|
|
|
11-20-2018, 03:46 AM
|
#4
|
Montana Master
Join Date: Apr 2016
Location: Auburn
Posts: 879
M.O.C. #18474
|
According to our service center, there is a sensor in the AC unit that has a connection that either needs replacing or that the sensor has come out of its location and is hanging by the wires. Some of them have burned the connector, but some only need to be pulled apart and dielectric grease put on and reinstalled. Ours has already had the sensor replaced once that cured the problem, but since it came back this summer, I've been too down with my back to actually get up there and do something about it. It will not hurt anything to leave it though according to my dealer.
__________________
2020 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin, Discs,
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
|
|
|
11-20-2018, 07:47 AM
|
#5
|
Established Member
Join Date: Apr 2017
Location: Full Timing
Posts: 13
M.O.C. #19649
|
Quote:
Originally Posted by scottz
You did not say what year your Montana was, I assume you have capacitive touch thermostats. Call Dometic customer support: (800) 544-4881
You could also reset it and see if the error comes back. To reset:
- With the HVAC unit off
- Touch mode and up at the same time, two dashes will appear
- Touch mode again, reset is complete
|
Coach is a 2018. performed the reset yet the error came back.
|
|
|
11-20-2018, 09:17 AM
|
#6
|
Site Team
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 1,921
M.O.C. #19755
|
Dometic tech support has been very helpful when I called.
__________________
Scott & Alta
2017 Montana 3160RL, Legacy, Onan 5.5Kw, Solar
2022 F-450 Lariat Ultimate
|
|
|
03-07-2023, 01:47 PM
|
#7
|
New Member
Join Date: Mar 2023
Location: Rural Shade
Posts: 2
M.O.C. #32430
|
After receiving D4 error code I took the cover off the AC unit, the styrofoam chunk on top (2021 Montana 3781RL) and the metal shield over the circuit board. No problems found. I then saw the temperature sensor wire lying on the ceiling panel, instead of being stuck into the condensor fins. I pushed the probe deep into the condenser fins and reassembled everything. Now there is no error code and the unit does not freeze and require manual shut off to thaw. Maybe I just got lucky but it was a simple free fix.
|
|
|
03-08-2023, 07:02 AM
|
#8
|
New Member
Join Date: Mar 2023
Location: Rural Shade
Posts: 2
M.O.C. #32430
|
Sorry folks, I believe the "evaporator core" is the component that the temperature sensor gets stuck into. I previously stated "condenser" but that is the part outside of the insulated compartment area which removes the heat.
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|