U
undertrained
Hello,
The scenario: Potterton promax HE combi, zoned off up and down.
Issue: heating staying on when stats are off, boiler stat up to about 62 degrees
I think I have diagnosed correctly. So one of the 2 port valves wasn’t spring returning when turned off at room stats. When I pushed the lever to make micro switch contact, the heating led came on. When released it went off. Replaced actuator head. Seems to be working fine.
The scenario: Potterton promax HE combi, zoned off up and down.
Issue: heating staying on when stats are off, boiler stat up to about 62 degrees
I think I have diagnosed correctly. So one of the 2 port valves wasn’t spring returning when turned off at room stats. When I pushed the lever to make micro switch contact, the heating led came on. When released it went off. Replaced actuator head. Seems to be working fine.