Water too hot

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Roy10289

Roy10289

.
Oct 13, 2007
179
Hunter 37.5 Plattsburgh
I have a 6 gal Seward electric water heater on my 1995 Hunter 37.5. Since I have owned the boay (2years),when plugged into shore power the hot water is so hot you must be careful not to burn yor hands. I looked in the manual and it says water should be no more than 140 dehrees,yet there is no thermostat to adjust anything. Has anyone had a similar problem an found a solution?
 
Don12364

Don12364

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Dec 2, 2003
1,637
Hunter 376 Warsash, England --
I have a H376 with the same problem. The thermostat is inside the immersion heater and is non-adjustable.
There may be a reason for this. We were gunning the engine for quite a long time one day and it was running hot.
Next day when we plugged into shore power - no hot water.
Reason, the engine temp had heated the Seaward tank to beyond the point where the automatic overheat cutout tripped. i.e. it thought the electric thermostat had stuck in the ON position.
Took some time to diagnose but the cure was quick. Just remove the cover over the immersion heater and press the red(? I think) button.
Power was restored to the heater.
Also by having maximum amount of hot water, which gets diluted when water is drawn off, means more useable hot water.
If the water temp represents a problem one can fit a mixing valve on the hot outlet pipe to blend some cold with it whenever a faucet is turned on.
 
Roy10289

Roy10289

.
Oct 13, 2007
179
Hunter 37.5 Plattsburgh
Befor the day you gunned the engine,was your water too hot when just plugged into shore power? I read that when the water is heated by the engine anitfreeze running through the coil,it will get VERY hot as there is no thermostat to control it. I have hot water while at the dock so I guess it is not the problem of that red overheat button. However I will look and try giving it a push to reset. Thanks
 
Don12364

Don12364

.
Dec 2, 2003
1,637
Hunter 376 Warsash, England --
The temp when on shore power is always too hot to put one's hand under the stream after it has run for a while; but we have never thought it dangerous. Likewise even when we have been motoring.

The engine thermostat controls the temperature of the water circulating in the Seaward tank coil so if the engine is at 85°C = 185°F then the tank could also get to this temperature.
Scalding!
 
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