Our new place has a Valliant combi boiler, about 15 years old. It's got this little box underneath with wire running to it. Anyone know what it's for?
Transmitter/receiver for a remote thermostat type thing?
We have one of those so that must be it. Thanks.
@owl started
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Our new place has a Valliant combi boiler, about 15 years old. It's got this little box underneath with wire running to it. Anyone know what it's for?