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MrWizard's avatar
MrWizard
Moderator
Mar 15, 2022

No hot water flow, stopped up ?

Atwood G6A-8E, RV 1997 Fleetwood Bounder 36S
The WH is in a sealed box next.to water bay, this is outside under the RV, no access to connections.at back of WH,
Water goes into the water heater , it does not flow out the taps, I.removed the drain plug and only clear clean water comes out, no sediment, leave drain open turn on water pump.lots of Clean clear water comes out,
When I turn Bypass valve to bypass mode, hot water taps have cold water good flow,
I.have tried compressed air into the hot water drain in an effort to clear any clog and flush the water heater afterwards, it did not work, I have done this to both HW and CW drains and lines taps closed water heater drain open, I'm.ready to buy a borescope to examine inside the wh to look at the HW outlet, also going to remove and look at the bypass valve, some pix.to explain







Last photo underneath RV looking up at the sealed box, metal covered with vehicle undercoat, the two flexible LP lines are visible, they goto WH & the rear furnace

I hope our resident experts can shed some light on fixing this, I'm hoping for.flex lines inside the box, so I can slide the water heater out, maybe it's a clogged check valve of some kind

Sorry about the photo size, I'm on my phone, not as easy to manipulate pages and photos

76 Replies

  • After flushing my water heater I had no flow at the sinks {kitchen and bathroom}. Someone from the Forum suggested I pull the aerators and check/flush the debris that migrated up from the water heater...Bingo! Rinsed them out and the water flow was restored to normal.

    :C
  • Can you feel the line is hot to the by-pass and not past there? Or with an IR temp gun.

    How can you fill the tank before heating it unless you can get the air out of a hot water tap? Get hot air/water from the relief valve?
  • How do I get access without tearing open a sealed weather proof box, that protects the water heater from the elements and road debris, I don't dare unscrew the front plate break the weather seal and attempt to pull it out , if it won't move because the water and LP lines are solid instead of flex, I don't like the way this is installed, no access with out destroying the integrity of the enclosure
  • There is usually a check valve on the hot water outlet. Those fail and block hot water from leaving the water heater. The top fitting on the rear of the water heater.
  • That's what I thought until I saw.that I have good water flow.into the heater ,
    Tested by removing drain plug then turning on water pump,
    The biggest problem diagnosing and repairing is the lack of access to the back of the water heater