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Installing an external thermostat in a baxi combi boiler

Posted: Tue Sep 16, 2008 3:49 pm
by gareth142
I have a Baxi combi boiler in the attic and want to add an external programmable thermostat downstairs.

At the moment the Optional Integral Timer is installed. Can I simply unplug the built in timer and wire in the heatmiser thermostat to these four terminals? I have tested this and it seems to work fine.

Many thanks in advance for any help.

Posted: Tue Sep 16, 2008 5:30 pm
by plumbbob
Consult the wiring diagram in the installer handbook. If not available download from the Baxi website. It will explain exactly how to connect a programmable thermostat to the boiler.