i have 2007 40DA. My aft and forward...

[BWLF]

i have 2007 40DA.  My aft and forward CO monitors do not have power coming to them.  they are both on the port side.  the main salon on the starbard side has power.  Anyone know where they may be connected to breaker or fuse?

[wingless]

Welcome to the forum.

Check the factory wiring diagram for your boat.

On my 2000 380DA, there are a pair of inline 1A fuses near the salon DC distribution panel, one feeding each of the CO detectors.

These show on the wiring diagram for my boat.

[Pizan]

Check behind your AC/DC panel. There should be a block with fuses, I believe they are 1amp each. Check to see if the need to be replaced.

[Big_mike1]

There are port and starboard breakers on panel also for power

[CCH]

When I bought my 2003 the co2 detectors were all showing no power. I pulled the covers off and found that they had been disconnected internally. They have a certain expected lifespan related to the sensor working correctly. When this is exceeded they will blink or make a tone telling you they are expired. Kind of like the ones in your house. I reconnected mine and they have been fine for a couple of year, but will have be replaced at some point. BTW: I do not think they make them like this anymore.