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Old 11-15-2018, 08:07 PM   #1
LifeMadePortable
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Furnace Failure ~ Carbon 337

Hubby here (shared account).

We have a '19 Carbon 337 and our furnace is having trouble.

The fan kicks on, we wait to hear the ignition flame up, it doesn't. Instead, the system just shuts down.

We read through the manual + called the dealership (Terrytown RV in Michigan).

Something about a reset switch, which I found ... tediously ... because we have the "small exhaust panel" which means accessing the furnace requires the grease man from Ocean's Eleven.

The reset button has two positions: "off" and "reset". It wasn't off.

We just got this thing and NEED the furnace. I fear we may need to have someone come out and first destroy our home to get the furnace out before replacing a minuscule something, then re-wreck everything hammer-taping it back into place.

Advice is needed. Please.

I'm supremely disappointed that a) this has happened so early in our ownership and b) is so impossibly inaccessible to take steps with.

(already been through "troubleshooting", a bit of a farce).
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Old 11-15-2018, 08:26 PM   #2
chuckster57
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If you never hear the “click,click” of the igniter then I’m afraid you have an issue that would require diagnosis from a technician. If your versed in the use of a Volt/ohm meter you could troubleshoot.

There are safety’s built in that won’t allow ignition if conditions aren’t met. There is a “sail switch” that senses enough air flow ( unlikely) and a “limit switch” (possible/probable) that senses the temperature of the plenum.

Testing of both is best done with the furnace removed, and since your under warranty, I would take it to the dealer. In the meantime, if your plugged into shore power use electrical heaters. We use the oil filled as they draw less amps and are more child/pet friendly.
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Old 11-18-2018, 05:58 AM   #3
rbrdriver
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Did you bleed your propane system first by running your cooking stove for a little bit? A lot of times on a new rig or when you change propane tanks you have to bleed the air out of the system first.
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Old 11-18-2018, 08:36 AM   #4
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My 19 Hideout 303RLI had the same problem (on our 3rd trip) dealer found a failed board was not allowing the gas to flow. So the fan would run it would try and light and when it didn’t it would shut down like you described.
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Old 11-18-2018, 08:41 AM   #5
ChuckS
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After 3 attempts to ignite furnace will go into lock out mode. To clear turn thermostat off. Then back to furnace

Since fan is coming on for furnace perhaps you’ve just got air in the feed line and need to purge it.

Try relighting several times listening outside at furnace exhaust for a pop pop sound indicating DSI is sparking.

If you hear that and after a few lockout resets it wont ignite then I’d be betting on furnace control module.
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