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Old 05-05-2018, 10:32 AM   #1
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water heater

hi all

water heater works well on electric and gas, but every once in a while when on gas,it will set off the propane detector.. windows and bins closed,no exhaust fan running.....any ideas


thanks for any imput
kevin
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Old 05-05-2018, 10:44 AM   #2
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Exhaust from the heater getting into the RV.

I know mine does it from the generator over time so don't see why it cannot happen from the heater if the exhaust is puddling around the side of the unit. Genturi solves the generator problem. No idea for the water heater. I might try some painters tape as a trouble shooting tool to seal areas that might be letting in exhaust. Seals well and comes off cleaner than most tape. Find the leak and use a more permanent fix.

Low battery voltage will set off some propane detectors. I doubt the heater is loading the battery that much but not aware of your other loads. Something else to check.

Please post results if you solve this.
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Old 05-05-2018, 10:48 AM   #3
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No direct connection between water heater combustion/exhaust chamber and inside of RV .....

Is water heater located below/near any window?

Any other propane appliance in use at same time when LP Detector goes off?

Does LP Detector actually go off.....alarm/require reset or JUST Chirp?

How OLD is LP Detector.......year of RV??
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Old 05-05-2018, 01:54 PM   #4
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If the propane is burned, the propane detector will not detect it. It detects flammable gas.

Once propane is burned, it becomes the job of the CO detector.

If you don't smell propane in and around the water heater look for another source of unburned gas.

To name a few, loose propane connections, bad regulators & control valves, charging batteries, portable generators and gas cans, in compartments, produces flammable gas fumes that propane detectors can detect.
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Old 05-05-2018, 08:23 PM   #5
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water heater

lp detector does go off ...it is old .co detector is new. have isolated it to water heater when on gas, and wind is blowing on that side of the coach,found a bit of a gap above the heater and put some vent putty to seal it up. i will try some painters tape elsewhere if this fails.

thanks for the responses
kevin
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Old 05-05-2018, 09:29 PM   #6
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Have had same thing happen on our dolphin. On Washington coast 60 70 mph wind against side will extinguish flame. Just turne off until storm passes.
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Old 05-05-2018, 09:52 PM   #7
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Quote:
Originally Posted by bkc914 View Post
lp detector does go off ...it is old .co detector is new. have isolated it to water heater when on gas, and wind is blowing on that side of the coach,found a bit of a gap above the heater and put some vent putty to seal it up. i will try some painters tape elsewhere if this fails.

thanks for the responses
kevin
How old?
Older then 5 years...should replace it
On backside of LP Detector will be a stamped 'expiration date'
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Old 05-06-2018, 06:29 AM   #8
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First though we call it a PROPANE detectorm it is, in reality an Explosive Gas Detector.

The thing can detect propellent used in spray cans. ALcohol. Gasoline vapors, Farts even some battery gasses.

Second as others have said all the Propane parts on the water heater are OUTRSIDE, though the connection is not all that well sealed it is in theory possible for gas to enter the RV, nto enough to set off the alarm . and even then it is only theory in practice it should not happen.

I had to tear mine down and put on a new tank (other reasons) last summer so I learned a lot about how they are assembled.
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Old 05-07-2018, 06:13 AM   #9
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Read labels. Propane is used as the propellant gas in many spray cans as a replacement for freon. In small quantities it it not a hazard.

Among other things generator exhaust will set off the detector. That is why I use a genturi a lot. If it happens with petrol exhaust it is reasonable to think it will happen with propane exhaust.
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