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03-05-2017, 03:26 PM
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#1
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Member
Join Date: Nov 2016
Location: Chattanooga, TN.
Posts: 58
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AC Unit will not start
The front ac unit on top of my 2004 Allegro Bay will not start. If I have the fan running and go to cool even the fan stops.
The back unit starts instantly and cools well.
It's not like it runs but doesn't cool, it just doesn't do anything?????
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Old Bob, Navarre, Florida
2013 Allegro Open Road 32
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03-05-2017, 06:05 PM
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#2
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Oct 2007
Location: Cookeville, TN
Posts: 544
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You might possibly have a problem as I did. My thermostat had a problem with the circuit board and would start if you flexed it a bit. I suspect one of the solder joints is a cold solder joint and plan on taking mine apart after I get back home and resoldering every joint on the board. Unless you are experienced with this, would not recommend you doing it. The option is purchasing another thermostat. 
You could possibly also have a bad start capacitor in the a/c unit on the roof. You would have to take the cover off and check the capacitor or get a heating / cooling tech to check it for you. 
Hope this helps...burfurd
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K4WQK
2012 Tiffin Phaeton 36QSH Diesel Pusher, TireTraker TPMS, Safe-T-Plus, BrakeMaster, '08 Honda CRV, Protect-a-Tow
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03-05-2017, 06:15 PM
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#3
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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Quote:
Originally Posted by oldbob
The front ac unit on top of my 2004 Allegro Bay will not start. If I have the fan running and go to cool even the fan stops.
The back unit starts instantly and cools well.
It's not like it runs but doesn't cool, it just doesn't do anything?????
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What make/model thermostat do you have? Maybe a reset will work?
Dometic 5 button?
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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03-05-2017, 07:04 PM
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#4
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Member
Join Date: Nov 2016
Location: Chattanooga, TN.
Posts: 58
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Quote:
Originally Posted by palehorse89
What make/model thermostat do you have? Maybe a reset will work?
Dometic 5 button?
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I'll look at the thermostat tomorrow, and if I have the one you mention, how do I do a reset?
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Old Bob, Navarre, Florida
2013 Allegro Open Road 32
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03-05-2017, 07:11 PM
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#5
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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Quote:
Originally Posted by oldbob
I'll look at the thermostat tomorrow, and if I have the one you mention, how do I do a reset?
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Hope this helps......
For 5 button reset:
SYSTEM RESET
1. Turn the ON/OFF switch to OFF position.
2. Simultaneously depress and hold the MODE and ZONE push-buttons while turning the ON/OFF switch to ON. FF should appear in the LCD display until the MODE and ZONE push-buttons are released.
3. When a dip switch in the system control board is turned ON or OFF after initial configuration, a system reset will need to be done before the Comfort Control Center will recognize the updated selection.
For 4 button reset:
a. Turn the ON/OFF switch to ON. The display light with
data should come on. If the light and data are not there,
see Section B2 Cable Assembly.
b. Depress mode to activate display light.
c. Depress the bottom two buttons (up & down) together.
d. While still holding the two buttons add the third from the
bottom (mode) , hold all three for a few seconds.
e. Release the third (mode) button.
f. Release the bottom two (up & down) together.
g. Depress the mode button. The display light should be
off. If not, repeat steps 2 through 6.
The control should return to the default setting of 68oF for
heating mode and 72oF for cooling mode.
__________________
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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03-05-2017, 08:33 PM
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#6
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Registered User
Join Date: Feb 2008
Posts: 3,607
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Swap thermostats. At least you'll know if your problem is there or on top.
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03-06-2017, 08:32 AM
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#7
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Senior Member
Tiffin Owners Club Winnebago Owners Club
Join Date: Feb 2012
Location: Las Cruces, NM
Posts: 4,040
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Sounds like it is time for a Start capacitor on the A/C compressor.
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Roger & Mary
2017 Winnebago Navion 24V (Sold)
2014 Tiffin Phaeton 36GH (Sold)
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Linear Mode
