Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 11, 2025 ...

duo-therm controller

August 18, 2020, 10:46:03 am

H Help! have no power to duo-therm controller. Can it be by-passed Cover came off the rear A/C unit and it rained. Not sure if something got wet

Quote Selected

Re: duo-therm controller

Reply #1 – August 18, 2020, 01:31:47 pm

Check the 3 amp fuse on both front and rear upper boards on the ac

Quote Selected

Re: duo-therm controller

Reply #2 – August 18, 2020, 01:56:59 pm

  Are the boards located on roof under  A/C cowling? Thanks

Quote Selected

Re: duo-therm controller

Reply #3 – August 18, 2020, 04:20:27 pm

Yesterday, I went to work inside the coach in almost 110 degree weather but had no reading on either 5 button Duo-Therm display and no AC. Strange as it was working a few days earlier. I checked the #4 & #6 breakers, pulled the cover off and put a meter to the CBs then pulled the panel up on the ACs and checked voltage there. 118 volts everywhere but no display and no AC.

I changed the fire extinguisher by the entry several days ago and guess what I accidentally hit?

Pierce

Quote Selected

Re: duo-therm controller

Reply #4 – August 18, 2020, 05:49:26 pm

Have no idea what you hit. Please do tell

Quote Selected

Re: duo-therm controller

Reply #5 – August 18, 2020, 06:39:35 pm

The master 12voltv disconnect switch.

Quote Selected

Re: duo-therm controller

Reply #6 – August 18, 2020, 07:10:39 pm

Oh, crap

Quote Selected

Re: duo-therm controller

Reply #7 – August 18, 2020, 07:37:00 pm

what does the 12v master switch have to do with 120v ac system?
My 12v master switch is on. I'm sorry but you lost me some place.

Quote Selected

Re: duo-therm controller

Reply #8 – August 18, 2020, 07:46:17 pm

Tom,

The control side is fed off the 12VDC seems like on your age coach it is somewhere along breaker 50 to 54 that is hid behind the kick panel.

Mike

Quote Selected

Re: duo-therm controller

Reply #9 – August 18, 2020, 08:18:49 pm

Parts of the system are 12volt

Quote Selected

Re: duo-therm controller

Reply #10 – August 18, 2020, 08:27:14 pm

Yes, the dreaded salesperson switch struck when I was least expecting it. I had a 120V mindset and didn't even think about it. I had not turned far and even looked normal but when I pushed the carpet back, the "on" position was close but not close enough.

Lesson learned.

Pierce

Quote Selected

Re: duo-therm controller

Reply #11 – August 19, 2020, 08:10:14 am

Sorry, I've been out in the sun too long. Was never known to be the sharpest knife in the drawer. I get it now.

Quote Selected

Re: duo-therm controller

Reply #12 – August 19, 2020, 10:23:00 am

Tom,

As hot as it's been in California, everyone here has been out in the sun toooo long. Dark today and cooler, but that's from a fire about 10 miles away. I will finish the generator today and know that the blackouts will come to our area before too long.

Pierce

Quote Selected