Best wood Tips and References website.
Does Wood Boiler Pump Run All The Time. The thermostat wires come into the honeywell aquastat. Pressing the reset button had no effect.
He said this should be switched by the programmer/valves. Based on the short description of your system it sounds like you only have one zone or thermostat controlling the whole house. I turned off the temperature control and programmer but the pump continued to run.
Based on the short description of your system it sounds like you only have one zone or thermostat controlling the whole house. Pressing the reset button had no effect. Disconnecting either of the 2 thermostat wires in the aquastat stopped the circulator pump from running.
It's a grundfos pump working with a potterton suprima 30l wall mounted fan assisted balanced flue gas boiler. However, we don't know whether your boiler is designed to maintain a minimum core temperature or not. The boiler itself is switching on and off correctly, presumably just keeping the water in it's internal loop at the correct temperature as heat is lost.
The boiler tripped out last night when i had it on the 24 hour setting to heat some water up. He said that there was 240v permamntly on the live return to the boiler and this would make the boiler pump run all the time. The pump does not run 24/7, but appears to run all the time that the programmer is between it's on and off setting for the hot water.
The motorized valves appear to both be operating correctly. The thermostat wires come into the honeywell aquastat. He thinks it probably is a wiring fault.
