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Old 09-23-2020, 02:15 PM   #1
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LP/CO2 Alarm

Hi all,
We have a new Coachman Pursuit and ever since we bought it, the CO2/LP alarm will go off at random times. It can be fine for months and then just go off for 30 seconds and then stop (while no one is in it so I can't blame the dog). The LP is turned off.
So, after the last camping trip and it went off 3 times overnight, I pulled the fuse to get a good nights sleep.
I have since removed the unit and am going to replace it with separate units instead of a combo one and use Plug-In ones as opposed to hard wired. I think the unit must just be bad as it's replacement date isn't until 2024 and I've tried everything to get it working properly. Sometimes it's the LP part that flashes other times the CO2.
So, I have the old unit removed and temporarily put electrical tape around the 2 wires so they don't touch or anything.
The fuse also shows T.HTR on that circuit. Anyone know what that might be and will me disconnecting the LP Detector affect it's functioning.
I'll be the first to admit I am not the most electrically minded person.
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Old 09-23-2020, 03:34 PM   #2
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Location: Part-time out of Mesquite, TX
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On the two detectors, I also prefer to have them in two separate units but the dual ones are becoming quite common. If the RV is new, off-gassing of the glues and construction materials can sometimes cause those to alarm. Poor ventilation could make that happen. Another cause is that many will alarm if the supply voltage drops too low, say to around 10.5V/ I would stick with those that operate from the RV 12V system as they are used because you don't usually use the RV without that available. Batteries do run down or fail with the other kind.

As to the fuse, HTR usually stands for heater. I don't know what heater the T would be. and am guessing on the HTR.
Good Travelin! Kirk
Full-time 11 years, now part-time.
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Old 09-23-2020, 04:24 PM   #3
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Hadn't heard of the construction materials or glue potentially causing a problem. And it is a new motorhome.
Each time it's gone off, it's been plugged in to shore power (or with generator running) so it 'shouldn't' be low voltage.
I'd also thought heater but our electric heat pump and water heater work fine (and did with fuse pulled). It's only a 5 amp fuse. Maybe it's the ignitor for the lp heater or water heater options.
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Old 09-23-2020, 06:15 PM   #4
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I was going to say tank heater, as in holding tank heater(s). But I'm not sure (have never had tank heaters) that a lowly 5 amp fuse sounds right. I kinda wouldn't think the CO detector would be on the same circuit anyway,,, but who knows!
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Old 09-23-2020, 08:02 PM   #5
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We actually had ours go off in the middle of the night last month. After close inspection by us as well as the responding Fire Dept found lint in the unit. A good vacuum and all was good.
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