When it tripped the electric after 5 mins it would trip straight away when I switched it back on didnt think the heater would cause that had a motor do it on 1 before that showed fine when i meggared it
Heater relay cuts in after about 5 mins. If you switch it back on after tripping prog carries on from same place so relay cuts in straight away. I might be wrong but still sounds like heater to me!! Al