A/C randomly shuts off and turns back on

Colby340DA

New Member
Mar 12, 2017
4
Grand Lake O' The Cherokees
Boat Info
1999 340 Sundancer
Engines
7.4 mpi mercruiser w/ v drives
ive been battling ac problems in my 340 all summer. First it was the capacitor on the gen and I noticed the ac panel was messing up so ordered that as well. Everything seemed to be ok then after running on shore power for some time it would just shut off then come back on and continue doing that. Now I've noticed it happening when running on the generator. Ideas?
 
Have you checked the water flow. Low flow could make it shut down.
 
You sure its just not cycling because it reaches its temperature setting and then shuts off. When it warms up it comes back on. Mine cycles every time its on...
 
Do you have an smx panel? If so remove it and clean up the connector going into it. Put some dielectric grease on it and put it back. If that doesn't fix it I'm thinking you will have to get the panel repaired by flight systems.
 
Sounds like the control board to me. Had the same issue earlier this year and replaced it successfully.
 

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