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PostPosted: Thu Sep 28, 2017 7:52 am 
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Hi all. Our combi boiler has thrown a spanner in our house move.
DHW working fine.
Diverter valve working ok. But diverter valve motor not functioning to CH position. It stays on DHW setting. With motor removed, CH heats rads ok.
Have fitted new PCB, checked signal from indoor thermostat. Ok.
Still no boiler when thermostat wants to heat the house.
Only other thing is the CH NTC sensor. This reads -19.8kohm when pipe from exchanger is hot. This goes down to +2-8ohm when cooling.
Really don't want a big hill just as we're moving out...i hope it's the sensor (new one on order), but if that don't fix it...god only knows what it is.

Any ideas appreciated.

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