Water heater bypass problem-2016 Winn Suncruiser 38Q

Fixed it well and quickly. Turned out to be the check valve not the bypass. Difficult to get at but took it apart and removed insulation and replaced valve and returned the insulation.2.5 hrs of labor Had the vehicle winterized. They forgot to close and lock the access door but I walked around and found it . No harm but I advised a walk around takes little time and would instill confidence.

Goldencrazy wrote:
Why would the check valve matter with the bypass. Isn’t it more likely that the bypass is not closing thereby allowing antifreeze to flow into the water heater.

with the bypass open and entry into heater closed the solution will go thru the bypass and can enter the wh from the exit pipe.
bumpy

Why would the check valve matter with the bypass. Isn’t it more likely that the bypass is not closing thereby allowing antifreeze to flow into the water heater.

Goldencrazy wrote:
Hold on all you Camping World haters. It is now in the hands of my local Camping World and they are replacing the valve.. Biggest issue is getting to it.

let us know how it went when all is done.
bumpy

Hold on all you Camping World haters. It is now in the hands of my local Camping World and they are replacing the valve.. Biggest issue is getting to it.

There are 3 types of bypass 1,2 and 3 valve

If you have a SINGLE VALVE system, then there is a check valve on the hot water outlet... It may have failed.

In all 3 cases one or more valves may have failed.

To test you need to disconnect the lines from the water heater and see where fluid flows. ON the one valve system you will need a 1/2 inch iron pipe plug for the hot water line..

Test procedure
1: Valve

Disconnect and plug hot line (The line, not the heater) With valve in BYPASS put a container (or extend with an adapter and hose) the cold.. APply pressure if water flows on the COLD side.. bad valve. Plug the line and be happy.

IF no water flows on the cold line, Check valve failure is indicated, Leave hot line plugged, cap outlet, and be happy.

Multi valve system (2 or 3)

Extend both hot and cold lines to a container (No need to make a mess) and with valves in BYPASS see which line is flowing, that valve is bad.

deleted...wrong thread :S

I have a 2015 Winnie Vista. It only has one valve and a check valve. Your check valve may be bad. Since you said it worked before, I'd suspect that.

It appears to be stuck, probably debris. It is not closing to bypass. So i ran several gallons of anti-freeze into the water heater when it appeared the bypass was engaged but was not. The valve will be replaced. Does anyone have an idea that might free it. Compressed air, flushing, potholes?

Maybe it is the switch in the bay that says waterheater bypass. Perhaps it is not functioning. It is plastic so will star there.