Where did my furnace go?

[Porky Pig]

It was a bit cold this morning .. so I decided to turn the furnace on for a heat blast. Much to my amazement ... when I turned on my Duo-Therm "Comfort Control" panel and cycled through the options ..."Furnace" was no longer available. All I have is ... Fan, Cool and Heat Pump.

So, I went outside and checked the furnace .. the switch is on .. and the inline fuse is not tripped. I'm baffled.

[j54mark]

Comfort control panel? Cycling through options?

Exactly what was wrong with a switch with three settings: Heat/Off/Cool?

We recently sold an office building. One of the major improvements was I had replaced all 25 or so computerized thermostats with Honeywell mechanical units. No one could ever understand how to program the computerized models. Batteries failed. Circuit boards failed. It was just insane. After the change NOT ONE TENANT ever called to ask how to switch from "heat" to "cool". My thermostat service call expense dropped to precisely $0.00.

Mark

[overlander63]

Originally Posted by Porky Pig

It was a bit cold this morning .. so I decided to turn the furnace on for a heat blast. Much to my amazement ... when I turned on my Duo-Therm "Comfort Control" panel and cycled through the options ..."Furnace" was no longer available. All I have is ... Fan, Cool and Heat Pump.

So, I went outside and checked the furnace .. the switch is on .. and the inline fuse is not tripped. I'm baffled.

Porky, this may sound like a stupid question, but did you have that setting before?
Terry

[Porky Pig]

Originally Posted by argosy20

Porky, this may sound like a stupid question, but did you have that setting before?
Terry

Yes ... I had the "option" to choose the Furnace .. or maybe it was labled "heat" ... now I am unable to do that.

I do not have a way to choose the Atwood Furnace .. select a temperature and turn it on. Perhaps the board to the furnace is bad?

Looks like I'll be giving AS a call on Monday.

[yukionna]

Porky...you aren't losing your mind...my Bambi has the same thermostat and "furnace" is one of the options. Because the unit uses a board to cycle through and manage the options, it is most likely a board problem.

[Porky Pig]

Just a follow up to my furnace problem.

I talked with Jim at Airstream ... he suggested I check the "blue wire" and if that failed .. to climb up on the roof .. remove the AC shroud .. and check the dip switch.

So I put a meter on the blue wire .. and sure enough ... the side running from the AC was dead. So I got off my lazy pig butt ... climbed up on top ... and sure 'nuff ... the dip switch for the furnace wasn't totally switched over to the ON position. Must have vibrated loose.

Anyway ... we're warm now.

[overlander63]

Originally Posted by Porky Pig

Just a follow up to my furnace problem.

I talked with Jim at Airstream ... he suggested I check the "blue wire" and if that failed .. to climb up on the roof .. remove the AC shroud .. and check the dip switch.

So I put a meter on the blue wire .. and sure enough ... the side running from the AC was dead. So I got off my lazy pig butt ... climbed up on top ... and sure 'nuff ... the dip switch for the furnace wasn't totally switched over to the ON position. Must have vibrated loose.

Anyway ... we're warm now.

At least it was an easy fix. Hope heights don't bother you.
Terry

[aluminauts]

Since we have almost the same setup as you have, I was hoping that the root cause would work out to be easy to identify and easier to fix.
Glad it wasn’t “cosmic rays” working on your software or “little green gremlins” that sneak around looking to make perfectly good equipment act-up when they are needed.