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  • Boiler in the new house has decided not to want to heat the rads anymore. No fault code. Seems like the thermostat is just not giving it a call to heat. Reset the boiler and the control panel. Boiler is set to on in heating mode and thermostat up high (definitely past the "click"). Planning on fitting the Tado thermostat tomorrow, hope that fixes it. Any other ideas what could be wrong? Boiler display just has two dashes, which the instructions say no call for heat.

  • Motorised valve not fully opening? Often the timer and thermostat open the valve which has a switch and it is the switch output that is wired to the boiler call to heat. When the synchronous motor gets old it doesn't open fully and so doesn't activate the switch.

  • Just read a forum post somewhere else that talked about exactly that. Although since I turned both HW and CH on this morning, rads are heating up.

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