I have one of thiese in the workshop heater is OK runs but will only supply heater with power for 10 secs on any cycle not heat related i.e NTC because it will still only supply powerfor 10 secs with the heater disconected,
you can also hear the relay click off on the main control board after 10 seconds.
power cuts after 10 sec even when heater is detached the two thermostats are in the heater circuit, NTC sensor is attached via another plug and is seperate tried another NTC and it still does the same.
main control board looks ok and connectors fit firmly.
does not appear to be a heater or stat problem.
Thanks SparkyP
It has 2 blue wires to heater and 2 white wires to NTC sounds like a write off if it needs a new heater and control board.
Thanks for your help