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RV water heaters require an air gap at the top of the tank. Is it possible that your tank doesn’t have it any more.
Open the valve, turn off the incoming water supply. Run the water pump and open the hot faucet on any sink for about 5 minutes.
Close the valve and turn on the incoming water supply. Now open the hot faucet at the sink and let it run. You may get water for a minute and then you’ll get air. Let it run until no more air, only wTer comes out.
That should re establish your air gap. Let us know if that fixes it.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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