Just replaced the presumed timer for a new original. When set to timed it will not calm for heat. It is the same issue as the presumed faulty one I just replaced.
Works fine when set to constant. Thermostat is set to call. Off when set to off fine too.
Both the new and the presumed...
I'm having the same issue and I have replaced the timer with a new original. Before anyone asks yes the thermostat is set to call. If I switch the timer to on it works fine , off its off , but when set to timed it will not call for heat .