Good Sam Club Open Roads Forum: Tech Issues: Super frustrating AC issue
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 > Super frustrating AC issue

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dougrainer

Carrolton, Texas

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Posted: 07/11/21 05:33pm Link  |  Quote  |  Print  |  Notify Moderator

I still need the MODEL of the roof top unit. Doug

kfp673

PA

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Posted: 07/11/21 08:33pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

I still need the MODEL of the roof top unit. Doug


48204-669 Coleman Mach15

Indoor unit 9430D7153

wnjj

Cornelius, Oregon

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Posted: 07/12/21 01:44am Link  |  Quote  |  Print  |  Notify Moderator

kfp673 wrote:

Purple wire comes off the back of the selector knob. At the back of the selector knob it has 120v, it then runs via the harness up to the housing where the capacitors live where it is spliced to a back cable. 120V show there as well. Black cable then runs to the compressor which has 120v (actually they all ready about 117 + or -. Both sides of the capacitor also reads the same 117 ish.

T-stat has different colored wires including white. Anyone know how to properly test a rotary t-stat with a meter? The ceiling unit is model 9430D7153. I find it strange that I hear and feel no "click" when I rotate the t-stat knob. I would think I would feel that if it were working and sending a signal to the compressor to engage.

If you have 120V everywhere on the compressor you don’t have a complete circuit. Look here for a Coleman wiring diagram which likely is similar/the same as yours: https://ricardolevinsmorales.com/wp-cont........ostat-ideas-electrical-and-wiring-9a.jpg

In that diagram the yellow wire from the thermostat should be connected to the neutral (white) wire when on. If the yellow wire is at 120v it means it is open circuit and being pulled up through the compressor coil.

I’d say you have an issue at the thermostat. If it’s like the above diagram, white should connect to yellow when calling for cooling. You should be able to manually override by connecting yellow to white.

dougrainer

Carrolton, Texas

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Posted: 07/12/21 08:32am Link  |  Quote  |  Print  |  Notify Moderator

This flow chart should help you. Doug

https://www.airxcel.com/DesktopModules/RvProduct/Pdf/t001.2.pdf

https://www.airxcel.com/DesktopModules/RvProduct/Pdf/1976d136.pdf

Below, look at page 10. Remember-YELLOW is also NEUTRAL.

https://www.airxcel.com/DesktopModules/RvProduct/Pdf/1976141_copy.pdf

kfp673

PA

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Posted: 07/12/21 10:27am Link  |  Quote  |  Print  |  Notify Moderator

Well... I am 99% sure I have this figured out. Thanks everyone for the links and suggestions. I have multi meter tested everything I could think of and all of the suggestions on this forum but the one thing I did not do was mentioned above and that was bypass the T-Stat. I removed the yellow and white wires from the T-stat this morning and jumped them and BINGO!! we have cold air! Ironically I had left a message for the place I bought it to setup an exchange of the AC itself, but super happy it's the T-Stat. Of course the T-stat itself is not in stock anywhere including the factory. Since we are leaving for a trip Thursday I decided to just repurchase the entire ceiling assembly and have it shipped to arrive Wednesday and then I am setting up the return of the one I have. Figured this way even if the refund and return take a long time, I am temp out $200 ish. I will post 1 final time once it's replaced. Thank you all very much for your replies and help. Hopefully some day this thread will help someone else!

profdant139

Southern California

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Posted: 07/12/21 10:49am Link  |  Quote  |  Print  |  Notify Moderator

Great news -- well done!!


2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
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Weldon

Texas

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Posted: 07/12/21 11:18am Link  |  Quote  |  Print  |  Notify Moderator

Good news for sure. Is it too late to consider taking the thermostat to a local ac shop and buy a thermostat that will work with your unit? Much easier than the disconect and reinstall the complete unit.

wnjj

Cornelius, Oregon

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Posted: 07/12/21 12:15pm Link  |  Quote  |  Print  |  Notify Moderator

If the replacement unit doesn’t arrive in time for your trip, wire up a light switch between yellow and white so you can at least turn it on manually.

dougrainer

Carrolton, Texas

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Posted: 07/12/21 12:52pm Link  |  Quote  |  Print  |  Notify Moderator

kfp673 wrote:

Well... I am 99% sure I have this figured out. Thanks everyone for the links and suggestions. I have multi meter tested everything I could think of and all of the suggestions on this forum but the one thing I did not do was mentioned above and that was bypass the T-Stat. I removed the yellow and white wires from the T-stat this morning and jumped them and BINGO!! we have cold air! Ironically I had left a message for the place I bought it to setup an exchange of the AC itself, but super happy it's the T-Stat. Of course the T-stat itself is not in stock anywhere including the factory. Since we are leaving for a trip Thursday I decided to just repurchase the entire ceiling assembly and have it shipped to arrive Wednesday and then I am setting up the return of the one I have. Figured this way even if the refund and return take a long time, I am temp out $200 ish. I will post 1 final time once it's replaced. Thank you all very much for your replies and help. Hopefully some day this thread will help someone else!


Rotate the tstat to cold. Then take a punch or screwdriver and hammer and smartly tap on the Tstat housing. That may make the points close to work. But still replace the lower unit. Doug

3 tons

NV.

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Posted: 07/12/21 01:02pm Link  |  Quote  |  Print  |  Notify Moderator

kfp673 wrote:

Well... I am 99% sure I have this figured out. Thanks everyone for the links and suggestions. I have multi meter tested everything I could think of and all of the suggestions on this forum but the one thing I did not do was mentioned above and that was bypass the T-Stat. I removed the yellow and white wires from the T-stat this morning and jumped them and BINGO!! we have cold air! Ironically I had left a message for the place I bought it to setup an exchange of the AC itself, but super happy it's the T-Stat. Of course the T-stat itself is not in stock anywhere including the factory. Since we are leaving for a trip Thursday I decided to just repurchase the entire ceiling assembly and have it shipped to arrive Wednesday and then I am setting up the return of the one I have. Figured this way even if the refund and return take a long time, I am temp out $200 ish. I will post 1 final time once it's replaced. Thank you all very much for your replies and help. Hopefully some day this thread will help someone else!


Many Thanks to Doug for again sharing his sage knowledge [emoticon]

3 tons

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