AC pump relay vs water ump

Just Peachy Farms

New Member
Dec 20, 2017
17
Boat Info
'87 Sundance 410
Engines
Two mercruiser 330 gas bravo II
AC problem. Water lines clear and no air lock. AC compressor comes on but not pump so AC shuts down. Either pump is faulty or pump relay ( have three units) is faulty or both. How can I tell which to replace? Thank you, Billy M
 
check for power at the pump (cheap household tester) when it is supposed to be on.......if there is power there the pump is bad, if not, trace back until you find the problem
 
AC problem. Water lines clear and no air lock. AC compressor comes on but not pump so AC shuts down. Either pump is faulty or pump relay ( have three units) is faulty or both. How can I tell which to replace? Thank you, Billy M
If your pump has no power to it, your problem is most likely a bad trigger. Does your pump run when one of the other two A/C units are on? Try that, if it does run it is definitely the trigger associated with the first unit.
 
Ha! Turned out the pump had a 32A fuse blown discovered by repairman. Once replaced all running fine. Thanks to all for trying to assist! Billy M
 

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