I have a new, 2017 TT with a combo Propane/CO detector. We have been camping with it since the last week in Dec. One week ago, at 3AM of course, the propane alarm went off. I reset it and it would go the 5 minute reset period and start up again. No smell of propane. I was pretty sure there was no leak. After about 4-5 resets I turned off the propane and lit the range burner and ran it till the gas was out. Sensor still went off. I finally just disconnected the detector, again this was 3AM. Well, the next day I checked the voltage, about 13.3 at the detector. I hooked the detector back up. No alarm. Cut gas back on, no alarm. Well, almost exactly one week later, last night, again at 2:30AM it went off again. I went through the same procedure as above. Alarm would not quit. I disconnected it again. This morning hooked it back up and no alarm. Waited 2 hours and cut gas back on. No alarm. It has now been about 12 hours and no alarm. Guess it is waiting till 2:30-3:00AM LOL.Alarm is a safe t alert combo model which is pretty common. I read the paperwork and according to the indicator lights it is working properly. I think there is something wrong with the unit and disconnecting it somehow resets it. Really strange it has only gone off without stopping 2 days and they were 1 week apart. Actually it has gone off about three times other than the above, but for known reasons. Once I had sprayed some ant spray and the other 2 times my GF was using some hairspray or something similar. So we know it does detect. In these cases venting the TT stopped the alarm. Sorry for the long post but this is really weird. Anyone have a similar experience or advice?

yep, that happens...had the same experience one night.

The exposure to the sprays may have damaged one or both detector elements. I'd suggest replacing it with separate units properly installed with the CO detector mounted at eye level or so, and the propane detector located near the floor.

Was the voltage low at the time the alarm was going off? If you are running the furnace at night, the voltage could be dipping in the small hours of the morning.

Dutch 12078, Sounds like good advice. Thats the way my first TT was set up. Maybe I can get the dealer to help me out under warranty LOL. coolmom42, did not check voltage till the next AM since it was 3:00AM. Pretty sure voltage was ok as we are in the Keys and no furnace running. HWH and frig running on shorepower. AC running but that is 110. All lights in this TT are leds.

These units are quite sensitive and as long as your voltage to it is good, it sounds like a bad sensor. I had one go bad shortly after I bought a new RV. A call to the detector's manufacturer got me a new one through the mail without charge. Never had another problem. Great customer service.

interesting issue with Propane / CO detector | Good Sam Community

Learjet
Explorer
Feb 05, 2017
yep, that happens...had the same experience one night.
Dutch_12078
Explorer II
Feb 05, 2017
The exposure to the sprays may have damaged one or both detector elements. I'd suggest replacing it with separate units properly installed with the CO detector mounted at eye level or so, and the propane detector located near the floor.
coolmom42
Explorer II
Feb 05, 2017
Was the voltage low at the time the alarm was going off? If you are running the furnace at night, the voltage could be dipping in the small hours of the morning.
riven1950
Explorer
Feb 05, 2017
Dutch 12078, Sounds like good advice. Thats the way my first TT was set up. Maybe I can get the dealer to help me out under warranty LOL.

coolmom42, did not check voltage till the next AM since it was 3:00AM. Pretty sure voltage was ok as we are in the Keys and no furnace running. HWH and frig running on shorepower. AC running but that is 110. All lights in this TT are leds.
pigman1
Explorer
Feb 05, 2017
These units are quite sensitive and as long as your voltage to it is good, it sounds like a bad sensor. I had one go bad shortly after I bought a new RV. A call to the detector's manufacturer got me a new one through the mail without charge. Never had another problem. Great customer service.
Fizz
Explorer
Feb 05, 2017
I set one off after spraying Scotch Guard on a seat cushion.
Heard about dog farts setting one off once
riven1950
Explorer
Feb 05, 2017
Thank you pigman1. The paperwork does have a customer service number on it and I plan on calling the company first of the week. Oddly enough both of these problems were on Friday nights. I figured they would not be open over the weekend. I will explain to them and post back what I find out.
rockhillmanor
Explorer
Feb 05, 2017
I switched to a generic brand of RV antifreeze and it set the CO detector off. :R

Check the voltage AT the converter.
rwynkoop
Explorer
Feb 05, 2017
I replaced my LP detector last year with a LP / CO detector and have the same problem.

I think the problem is low battery voltage. The manual says it is only good till about 7volts on mine.

I think my batteries were ****, because they would drop overnight to about 10v, and during the day recharge to 12.4 in just a hour or so.

I hate the design, should not alarm when power is low.

I have since replaced the original 9v battery-backed co unit just to be safe.

I have had to unplug mine(While still having a working battery-backed co detector) to sleep.

Robert Wynkoop
tinstartrvlr
Explorer
Feb 05, 2017
Mine has done the same thing numerous times, with no gas present (shut off at tanks). Yet while lighting a Mr Buddy heater, where I could smell gas before it lit, no reaction from the sensor even though the heater was only a few feet away. They seem to be incredibly sensitive to methane as well (farts, black tank fumes drifting in through the roof vents, fumes from gray tank), anything in a spray can, etc. And in my case, it is always in the wee hours of the morning, when the air is very still. I finally got fed up with it and added a kill switch in the circuit so I can just shut it off, and reset it later. For the record, if propane is on, detector is active.