First - You don't need to run the pump if you are connected to city water.
Second - If no water flow to ANY faucet, hot or cold, by city water or pump running - then you have an isolation valve shut. City water does not go through the pump strainer.
Third - If the problem is only on the hot water side than the winterization valves are not de-winterized.
So, what year is your RV and when did you get it? When was the last time water worked "normally"?
Patiently awaiting your updates........
EDIT: I mis-read your OP - so it works on City water, just not with the pump.
Ok, now we're back to a clogged strainer or pump isolation valve shut.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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