The water heater problem

 



Note: I never finished calibrating the heater after converting to propane gas.

The water heater, a Rennai gas on-demand type, has had problems for a while. The temperature rises and falls. The water tends to get too hot or too cold.

I accidently discovered that the initial on-time delay could be  bypassed by turning on the tub spigot for a moment. The 'In Use' light comes on immediately if I do. 

This implies the pressure sensitivity of the heater. 

The watter line is 1/2". That may be too small. When I open up the spigot, the pressure drops and that triggers the heater flame. 

The shower head is an ergonomic 'green' type with reduced flow to conserve water. That may be a problem. 

I have two other heads I can try.

However, finishing calibration may be the solution since a build up of pressure seems to prevent flame ignition.


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