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Michael, Customer Service
Category: Appliance
Satisfied Customers: 9568
Experience:  I have been an appliance repair tech for over 30 years and will help you solve your problems.
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valiant thermo compact boiler - heating won't turn off when

Customer Question

valiant thermo compact boiler - heating won't turn off when thermostat and timer are off. If I turn off the hot water switch on the timer the heating goes off but when I switch hot water back on the heating comes back on again - all while thermostat and timer say its off
Submitted: 3 years ago.
Category: Appliance
Expert:  Michael replied 3 years ago.
Hi, I am sorry to hear that.
How old is your boiler?
Also may I have the model #?
Customer: replied 3 years ago.
11 years old don't know model number
Expert:  Michael replied 3 years ago.
Hi thank you you for that information.
This is a failed relay in the main control board at the boiler. That board will need to be replaced because the relay circuit that controls the heating among other things has stuck in the closed position. If you are handy you can replace this yourself.
But its best done by a heating mechanic or a plumber.
Thank you
Tech Michael
Expert:  Michael replied 3 years ago.