Alpha model HE CB25 - DHW is fine, but after setting up wireless programmer to be ON and room its thermostat to 22 deg min., 25 deg max, the heating fires up but then shuts down after about 2/3 minutes, even though room temp on programmer indicates only 18 deg.
I have tried another programmer i.e. transmitter, from an identical boiler with same result.
I have not changed the receiver.
Tags: