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Capt ay · 01-05-2023, 06:34 PM

Hello all,
Lost all 12 volt power to A/C, hot water heater, over head vents, lights,water pump and LP heaters. I did change one solenoid with no luck. All fuses checked good and batteries are at full charge.I'm not sure where to go from here.(The wife is not happy..lol)
Any help would be appreciated.
Thank you,
2009 Tiffin QBA 35
Ray Roberts
Brooksville Florida.

**Lt Dan** · 01-05-2023, 07:50 PM

First, check your 12v disconnect switch by the front door to make sure it didn't get tripped accidently (don't ask how I know about that). The other thing to check is the main 12v disconnect solenoid controlled by the switch, It's a special type of solenoid called a latching relay and is a common failure point. It can be bypassed temporarily by connecting both large posts on one side.

dabrooks · 01-06-2023, 04:46 AM

There is also a main 12 volt fuse in the battery compartment. It may look something like this. It would be installed where the 12 volt positive cable comes off the house batteries. I think it is rare they blow but easy to check https://www.amazon.com/Blue-Sea-Syst...50&sr=8-4&th=1

banna74 · 05-03-2023, 06:29 AM

Quote:

Originally Posted by Lt Dan

First, check your 12v disconnect switch by the front door to make sure it didn't get tripped accidently (don't ask how I know about that). The other thing to check is the main 12v disconnect solenoid controlled by the switch, It's a special type of solenoid called a latching relay and is a common failure point. It can be bypassed temporarily by connecting both large posts on one side.

You saved our day! We suddenly lost lights and a/c after my husband went out the front door. He and his RV friends spent two hours troubleshooting. While he was on the phone with Silverleaf, I searched the problem on IRV2, and found your post. We still are not sure how he tripped the switch, but your post saved the day! Many thanks!