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My raypak heater won't relight and the pilot is on

The heater shut off when the water flow was stopped. Now it won't turn on even though the pilot light is on.

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For the heater to burn, there must be water pressure and flow - and the heater must know of it. It is not enough that you know the pump is on, the heater must know it. Check your heater's water pressure switch.

What about the filter pressure ... high filter pressure would indicate need for a backwash. dirty filters slow the water flow. If your filter normally runs at 20 PSI (when clean) it should be backwashed at 30 PSI, rule of thumb = 10 psi over 'startup pressure'.

Your heaters job is to heat the water ... think of it as a very agressive bully. The water is absolutely necessary to keep the bully in check.

Posted on May 31, 2010

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