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Open Roads Forum  >  Tech Issues

 > Furnace pops breaker after 30 seconds.

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time2roll

Southern California

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Posted: 06/13/19 02:53pm Link  |  Quote  |  Print  |  Notify Moderator

Bring an electric space heater if you will have utility power.


2001 F150 SuperCrew
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rjsurfer

North Carolina

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Posted: 06/13/19 03:57pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Bring an electric space heater if you will have utility power.


No problem, I'm bringing my Mr Buddy Heater along with my Vornado electric.

Ron W.


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dougrainer

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Posted: 06/14/19 05:42am Link  |  Quote  |  Print  |  Notify Moderator

Dometic has a TSB/Recall out for the DF series. There is a possibility that the limit switch wires can contac the exhaust metal tube. IF that happens, I guess the breaker would trip as it would be a short. The solution is 2 fold.
1. You remove the outside exhaust port cover and see if the wires are touching or are melted. If so, Dometic replaces the furnace
2. IF the wires are not touching or damaged, Dometic sends a Fiberglass sleeve to install over the furnace exhaust tube to prevent the wires from touching and getting hot.
I would check this before going any further on repair. Doug

letter

An omission of a plastic wire tie to suspend the heat exchanger limit switch wires up and away from the
exhaust tube vent, allows the limit switch wires to potentially melt on the vent terminal, shorting to
ground, and causing either the fuse or circuit breaker in the circuit to blow, or the sail switch to become
inoperative.

Dometic has determined that certain small and medium Dometic/ Atwood furnaces (AFS, AFM. DFS,
DFM) with serial number range of 73985322-81099541

* This post was edited 06/14/19 07:42am by dougrainer *

Tim Nowicki

Alden NY

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Posted: 06/14/19 05:54pm Link  |  Quote  |  Print  |  Notify Moderator

there ya go! It appears Doug has the answer.

Tim

rjsurfer

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Posted: 06/15/19 04:02am Link  |  Quote  |  Print  |  Notify Moderator

OP back, looks like Doug's post is the answer [emoticon]

Before reading his response, being the genius I am, I changed the fuse to a 20 amp as a test and it worked. Of course, along with the heat came a burning smell so I shut it down immediately.

Makes sense now.

We will be on full hook up this trip so no problem keeping warm.

Ron W.

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