Carbon Monoxide alarm going off

Carbon monoxide alarms have a limited service life of about 7 years from date of manufacture. If you allow for warehouse time, this means maybe as short as 5 years after you buy them. If yours are old, they will indeed alarm constantly to let you know it is time to replace the alarm. For obvious reasons, this is better than simply quietly ceasing to work at all.

yes, thanks, I knew about the life span but these are both less than 2 years old. I've gone back and amended the original post. Thanks!

If hard wired perhaps the back-up batteries are dead?

Yup, I checked and replaced the batteries, and it's plugged into shore power.
Plus when I opened up the coach and ran the fans, the levels dropped and the alarms stopped. ??

Different types of detectors can go off if dirty. Try some compressed air/canned air and see if that helps.

Any new fabrics onboard? I've heard CO detectors will alarm on the gas given off by cushions, etc....

gitpicker2009 wrote:
Yup, I checked and replaced the batteries, and it's plugged into shore power.
Plus when I opened up the coach and ran the fans, the levels dropped and the alarms stopped. ??

So, do you think the detectors might be doing their job? We had a handheld propane detector we could use to verify. Is your propane low? Detectors can go off when the tank is near empty.

But the bottom line for me is. . . if you "cleared the air" and the alarms quit, there could just be a leak somewhere.

My parents bought a class B once and my sister and I both smelled propane when we went into the coach. My parents camped in it occasionally but never complained about it. My sister bought them a propane detector. We were all camping one weekend together and my sister asked why dad wasn't using the detector. He said "It doesn't work." She asked why he thought that. He said, "Well, everytime I put the darn thing up, it starts beeping." Duh Dad. You've got a leak like we've been trying to tell you. So my DH and BIL got to checking. There was a propane line under the coach that was leaking. Tightened it up and all was good to go.

I would have it thoroughly checked out. Maybe a propane company would do some tests for you.

Dale

Yes, I'm sure they're doing their job:). What I'd like to know is why??
What's causing this?

I thought about various fabrics "off gassing" etc, but there's nothing new in the TC. It's just sitting where it always sits waiting for use in Autumn.
Thanks for all the tips and advice.

Maybe the CO is coming from outside the camper. Put the one outside upwind of the camper and see if it goes off or if he levels go down.

Or try turning the dehumidifier off and see if the levels go down.

Depending on where you are in Texas, it is likely hot and/or humid. Either can cause false alarms especially if the heat is causing some out gassing. I had issues with when I did a lot of caulking in the bathroom, also once due to painting the plywood under the mattress and another time with due to a strong chemical odor from a plastic shower mat. The propane detector is especially prone to false alarms even when new but similar issues can cause false CO alarms.