CO2 detector going off from??toilet gas??

Beauty7 wrote:
We have a brand new (only 2 weeks) travel trailer-2017 Coachman Apex Ultralite 300bhs. We are also brand new RV'ers.

A few days after being in it, (we still are), we turned the fan on in the bathroom, and the CO2/propane detector went off full blast continuous beeps. (We DID NOT flush the toilet with the fan on). We re-set and fanned it to get whatever "smell" it might be detecting away, it finally stopped. This happened several more times. (Upon reading the pamphlet with it, we found it was installed, ankle height, only 8 inches away from the bathroom door, when the recommendation is 4 feet from any doors.) Does that make sense? Is that normal installation for a CO2 detector to be installed near the floor THAT close to the bathroom and any possible gases that may waft out?

Also during this time (this past Weds), we discovered after cleaning out the black tank, that we left it accidently open for 1 1/2 days (uggh) and had a not so lovely stench wafting through our place for a few days (yes-paranoid now about closing it, but complete lesson learned).
We gave a thorough cleaning, filling, rinsing, and bought Rid-X for the black tank thinking that would stop the weird, fan/CO2 beeper action.

Fast forward to today, Sat., 430am of course, we get woke up to the CO2/propane detector beeping full force. This time no fanning in the world made it stop. We did what everything says to do-open all windows, turned off propane, and call the fire dept. It DID stop then. They came, checked for leaks with their gadget that read 0 the whole time they said, and concluded it must be a faulty CO2 sensor.

Of course 10-15 mins after they left and we started closing windows, it crazily went off again. Now confident there are no leaks, we took out the fuse to get some peace. I know this is NOT the solution.
It is a Saf-t-Alert (MTI Industries) alarm. Is that even a good brand?

Any insights? Toilet gas? Bad placement? I have read other posts that have said to replace the alarm with a different one. Is that more feasible than having the company or my dealer who is 90 miles away (under warranty) replace me with a new one? IS there a "better" brand because now I'm leery of what I've got! Any help would be appreciated.

CO is lighter than air and tends to rise. All CO detectors should be installed higher up on the wall or on the ceiling.

Propane is heavier than air and tends to sink toward the floor.

Did the fire department check just for CO or did they check for all combustible gases. Each meter is designed to do a specific task.

I suspect you may have a slight propane leak somewhere in one of your systems. Turning the fan on would change air flow patterns and possibly cause propane at floor level to activate your detector.

It is not likely that off gassing or hairspray or deodorant is causing your problem.

If you are not smelling propane it's probably a good idea to replace the detector. It may be simple as that. If not you'll need someone with more sophisticated metering capabilities to identify your problem. Any fire department should have sufficient meters for the task.