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My hot water has gone off. It was working this morning and the pilot light has not gone out. How can I check for other explainations?

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  • espdinner Apr 25, 2010

    Thanks for responding so quickly!
    I have turned the thermostat up to check the effect on the radiators and they are working fine. Would this be the case if the thermocouple was the problem or not?

  • espdinner Apr 25, 2010

    Is a Potterton Osprey CF 150

  • espdinner Apr 26, 2010

    Many thanks Clay,
    I found the root of the problem, the kids had turned the immersion heater on and for some reason it had knocked the hot water off. All appears fine now.
    Thanks for your helpful time and advice.

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The pilot light is working so you know you have gas but you also know that the gas is not coming on. The pilot flame should be bright blue with the tip of the flame having a ting of yellow. A yellow flame is caused by a dirty pilot tube tip. Split flame is caused by dirt in the pilot tube. If the flame is not hot enough it will not tell the thermocoupler to turn the gas on. If the thermostat has not been moved and is still at the correct setting then I would suspect the thermocouple is bad. The thermocouple is mounted right next to the pilot light. It senses if the flame is hot enough for the gas to come on. If the pilot flame is not touching the coupler then it will not allow the gas to be turned on to the burner. Check the thermocoupler and see if the flame is touching the probe on the end. If not adjust it until the pilot flame is touching the coupler. If the flame is properly adjusted then replace the thermocoupler but shut off the gas supply before doing so. It will look like this. My hot water has gone off. It was working this - 0ec43e2.png

Posted on Apr 25, 2010

Testimonial: " Thanks! I have turned the thermostat up to check the radiators and they are working fine. Would this be the case if it was the thermocouple?"

  • NOT ME Apr 25, 2010

    Sorry I assumed you was talking about a stand alone hot water tank and not a hot water home heating system. If you have hot water to the radiators then the problem is not the thermocouple if the same hot water system is supplying heat and hot water. I am confused as to exactly what type system you have.

  • NOT ME Apr 26, 2010

    So very glad you found the problem.

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