Drayton Digistat RF1 and SCR fitted last March.
Recently the heating has failed to come on from time to time but the hot water is fine.
Investigations reveal that the RF1 is calling for heat and the SCR shows a steady green light indicating that the heating should be running. At the same time however the connections on the SCR which should be connecting are open circuit with 240v across them.
A couple of sharp taps on the SCR causes the connection to make and the heating to run normally.
Connections to the wallplate are fine and the pins that connect the SCR to its wallplate appear OK.
Time to replace the SCR? Is this one known to be unreliable? Any alternative suggestions for a basic wireless thermostat?
TIA for any replies.