Carbon alarm (2 Viewers)

[RollingRog]

I’m baffled! ( not hard to do) the carbon monoxide alarm on the MH keeps going off, this is the second one that’s doing it I changed the first just in case it was the battery this ones brand new so not a battery problem , there’s absolutely nothing on, no gas, no fridge nothing?
Anyone got any ideas?

 

[Odd job]

Put it outside the van if it stops you have a problem, possibly the battery, if it keeps going off outside, the alarm is faulty

 

[RollingRog]

Put it outside the van if it stops you have a problem, possibly the battery, if it keeps going off outside, the alarm is faulty

Do you mean the vehicle battery?

 

[Gellyneck]

Do you mean the vehicle battery?

or leisure battery?

 

[Riverbankannie]

Do you mean the vehicle battery?

In case Odd job has gone off to do a couple of odd jobs, I will jump in and say I think he means either the habitation battery or the vehicle battery.

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[steve69]

The motorhomes CO alarms have their own battery, surely. Are you referring to that battery that you have changed?

 

[Guigsy]

CO alarms can be set off with hydrogen (from an overcooked cab or hab battery) or petrol/diesel fumes or LPG.

The fact that two different alarms both triggered is concerning.

 

[RollingRog]

I will check both the leisure and vehicle batteries,thanks guys, for clarity I have installed a new kidde carbon monoxide alarm and you cannot change the battery in them you have to replace it entirely.
cheers all

 

[1967bowesj]

It will have a 9v pp3 battery, try swapping the smoke alarm battery over if the smoke alarm one is working ok, that should remove any battery faults, if alarm keeps trigering then alarm itself is suspect.
Just seen your last post RollingRog
That would suggest theres an issue giving the trigger.
Take alarm outside so it gets plenty air around it and see if it triggers

 

[Odd job]

I have just got back from cutting the lawn, I meant the CO alarm.

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[RollingRog]

It will have a 9v pp3 battery, try swapping the smoke alarm battery over if the smoke alarm one is working ok, that should remove any battery faults, if alarm keeps trigering then alarm itself is suspect.
Just seen your last post RollingRog
That would suggest theres an issue giving the trigger.
Take alarm outside so it gets plenty air around it and see if it triggers

Have taken the alarm off , can’t change battery it’s a fixed unit, bought a brand new one same thing happened, I’m investigating the batteries now, I’ve only recently bought this van, the leisure battery is dated 2011 same year as the van.

 

[Gellyneck]

Have taken the alarm off , can’t change battery it’s a fixed unit, bought a brand new one same thing happened, I’m investigating the batteries now, I’ve only recently bought this van, the leisure battery is dated 2011 same year as the van.

If it's a lead acid it's probably getting (is) way past it's best!

 

[Jev88]

Have taken the alarm off , can’t change battery it’s a fixed unit, bought a brand new one same thing happened, I’m investigating the batteries now, I’ve only recently bought this van, the leisure battery is dated 2011 same year as the van.

Typical for acid batteries to last 3-6 years depending on use and charger used .... So 2011 is well past it. Have you measured the voltage at rest?

 

[RollingRog]

Looking at replacing it to be on safe side

 

[Dave and Jen]

Farts also set them off....
don't ask how I know
Dave

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[meanders]

Check you have no leak in the manifold or exhaust system or that the fumes are not being sucked in as you are travelling. CO can linger a long time and if coming in through floor vents etc.

 

[Odd job]

Looking at replacing it to be on safe side

Did you put the alarm outside?

 

[DavidG58]

I am presuming the CO monitor doesn’t have a display of alarm level

I strongly recommend only using monitors with a display, they will trigger at very low levels and although still important to know, there could be no need to panic if the reading is at the lower activation level of 15ppm, whereas if it shows 100+ you need to evacuate quickly

They are so low value any doubt just change it

Did you buy the second unit separately or same time as the other, could be really bad luck and both faulty

 

[Gellyneck]

Farts also set them off....
don't ask how I know
Dave

Is Jen happy to be called a CO alarm?

 

[RollingRog]

Did you put the alarm outside?

Yes have also put the alarm just above the batteries to test out but it hasn’t gone off!
It was originally placed on the wall above the fridge so I’m wondering if it’s the fridge? No gas on but wondering if it’s the fridges own gas?

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[RollingRog]

Mystery solved!

It’s the leisure battery leaking

Although we did check this first and it seemed ok, but having left the mh locked up in the heat for the day it set the alarm off so a new one it is.

Thanks for all your input