Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Hi. We recently moved to a rented property. We have a ST7100 Central heating and a Potterton Profile 50e boiler. However even though I have set the times on the ST7100, the heating ligth comes on, but the potterton boiler does not start. Are these supposed to be linked. However if I go to the Potterton boiler and put it off and on again, it starts up and the central heating also starts but then it stops off after 10 minutes and the rooms are not warm enough. How do I control the temperature in the house? Is there some missing controls that I dont know about?

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  • Anonymous Mar 19, 2014

    Heating is on constantly. Will not switch off

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  • Honeywell Master
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You definetly have a control issue. However trying to diagnose the exact problems that you have would be very difficult without actually seeing the wiring. You defintely have a wiring/control issue but I cannot tell you exactly what it is without more info. Sorry, I would love to help you more...

Posted on Nov 13, 2009

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Posted on Jan 02, 2017

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