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Old 05-11-2014, 09:46 PM   #1
rpk
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No Hot Water

DeWinterizing (May 11th and it's snowing here in the Black Hills!).
I had totally drained and blew down my fresh water system last fall. Now there is no hot water in the coach. Did a Forum Search and did not find a case like this.
The heater works - gets hot. Open hot taps inside and cold comes out (kitchen, bath sink, and shower.) I do not have a bypass valve on the heater. The external "shower" valves are shut. Lift heater relief and hot water comes out. Open heater outlet hose and turn on pump, hot water comes out. No check valve in heater hot outlet. Blow heater outlet hose to kitchen sink hot faucet, air comes out.
The pump puts water in the heater and the hot line from the heater to the manifold and back to the sink is clear. Why is cold water coming out of the hot taps when the system is back together?
Help.
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Old 05-11-2014, 10:06 PM   #2
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Did you winterize it yourself or have someone do it? I know you said you don't have a bypass, but it sure sounds like the heater is being bypassed. Sorry can't help more.

Chuck
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Old 05-12-2014, 06:23 AM   #3
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How did you "blow down" the water system? How much pressure was your compressor set to?
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Old 05-12-2014, 07:28 AM   #4
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No Hot Water

I used 30 psi to blow it down and did what I considered to be a good job facing winter with temps in the minus 25 range. The heater is a Suburban SW6D with no bypass.

Help.
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Old 05-12-2014, 08:44 AM   #5
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I am not familiar with the Suburban water heater but on the Atwood water heater there is a mixing valve. My system did the same thing. Water heater would heat but no hot water throughout the coach. Turns out it was the mixing valve not allowing hot water to be released into the system.
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