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Thread: Service Lamp on Purex 400 Gas Heater ?- UPDATE and a ??

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    Service Lamp on Purex 400 Gas Heater ?- UPDATE and a ??

    Greetings--

    Heater will turn on and burn for 1-2 min, then service lamp lights and burner goes off. It will wait 2-3 min, and turn itself back on. Over and over. A week ago, it stayed on just fine.

    Unit is aprox 8 yrs old . It was here with the house so I have no idea about service ect.

    What to look for to repair/replace ?
    ===============

    UPDATE

    Local tech replaced flame sensor-- was *sure* that was it-- NOPE
    Same tech then wanted to replace the circuit board -- was *sure* that was it.

    I called and spoke withe PoolCenter.com folks. He suggested that it was probably the water flow regulator , causing the water to get too hot and trip the heat sensors. He said it was comon to see the regulating disc/systyem get rusted and impede the flow of water. The heat sensors indead open up after 5-7 min or operation

    I took it out (part # 27 on the diagram)-- and it was toast-- rusted up and springs were gone.

    QUESTION- Can the unit run without this flow control in place-- ie wide open water flow ?
    - Reji

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    bump
    - Reji

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    Kinguni's Avatar
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    Apr 2007
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    Re: Service Lamp on Purex 400 Gas Heater ?- UPDATE and a ??

    Quote Originally Posted by Piney

    QUESTION- Can the unit run without this flow control in place-- ie wide open water flow ?
    Sure. It just won't be very efficient - will use more gas and heat the water less. Not ideal to say the least, but can be done.

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    That make sense-- I just wanted to be sure that it wouldnt damage anything running it w/o the flow control valve. I'll order one Monday.

    Kids wanted to swim this weekend so I wanted to fire up the heater.
    - Reji

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    Kinguni's Avatar
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    Apr 2007
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    Winnipeg, Canada
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    I think my heater ran without it for some time. When I called out a service man to fix a dead gas valve he opened it up to service it and found that valve disintegrated. Being a 25 year old Jacuzzi heater the part was impossible to repair or replace, so we decided to disconnect it and purchase a new heater in the spring.

    Do not run your heater like this for too long as you will get condensation inside which can cause corrosion. Fix it ASAP!

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