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  1. J

    Boiler constantly cycling

    Any more thoughts please?
  2. J

    Vaillant EcoTec+ 837 with Honeywell CM907 - cycling on/off

    Hi, I'm by no means an expert but have a Honeywell thermostat also and that is the component that is making all your cycling happen. They are very sensitive, however they are meant to be efficient, particularly if set up correctly. They maintain a very stable temperature, but cycle the boiler a...
  3. J

    Vaillant EcoTec+ 837 with Honeywell CM907 - cycling on/off

    Hi, I'm by no means an expert but have a Honeywell thermostat also and that is the component that is making all your cycling happen. They are very sensitive, however they are meant to be efficient, particularly if set up correctly. They maintain a very stable temperature, but cycle the boiler a...
  4. J

    Vaillant EcoTec+ 837 with Honeywell CM907 - cycling on/off

    Hi, I'm by no means an expert but have a Honeywell thermostat also and that is the component that is making all your cycling happen. They are very sensitive, however they are meant to be efficient, particularly if set up correctly. They maintain a very stable temperature, but cycle the boiler a...
  5. J

    Boiler constantly cycling

    Hi, Is there a solution? Can I just turn the boiler stat down or turn on all radiators / increase pump speed? Could a gas engineer regulate the gas pressure to aid this? Thanks and regards, Jpm777
  6. J

    Boiler constantly cycling

    Hi Dan, The boiler stat on the front is set in the 3 o'clock position. There are no numbers on it just a gradual increasing scale and it is set to the round dot. The scale finishes in the 5 o'clock position. It just seems strange to me than it cycles on and off so frequently, in seems very...
  7. J

    Boiler constantly cycling

    Hi, I believe there is something wrong with the way my boiler is operating and wondered if you guys had any ideas? I have an open vent system with a Worcester Bosch 19/24cbi boiler. The problem is that although the boiler ignites fine and seemingly runs ok, after an initial period of...
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