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Boiler not firing in heating mode

JonMac · 2014-11-07 22:00:21

I've got a Buderus LPG gas boiler that has worked perfectly for 9 years. It runs a hot water tank and UFH. Normally it runs at a low flame to provide for the UHF and high flame when the water tank calls for heat. The modes are initiated by room stats and a thermocouple on the water tank. This week the boiler has refused to…

07-11-2014 10:00pm

#1

JonMac

Registered Users, Registered Users 2 Posts: 469 ✭✭

Join Date: September 2008

Posts: 362

I've got a Buderus LPG gas boiler that has worked perfectly for 9 years.
It runs a hot water tank and UFH.
Normally it runs at a low flame to provide for the UHF and high flame when the water tank calls for heat. The modes are initiated by room stats and a thermocouple on the water tank.
This week the boiler has refused to go into heating mode. In heating mode a 24V ac signal is sent out by the boiler and returned via a module that combines the 4 room stats. I have confirmed that that signal is correctly going back into the boiler.
My gut feel is that I've got a dodgy connection in the wiring.
Any other ideas?
Thanks.

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