The conventional central heating system was installed in 1987 when the house was built and has been largely untouched since then (pump and Honeywell valve changed over the years)
Over the last couple of days we seem unable to reduce the temperature of the radiators (there are no TRVs fitted). The eye level thermostat, made by acl, is located in the hall. I can hear it "click" when the knob is rotated to both reduce and increase temperature but it's not now affecting radiator temperature.
Could anyone kindly help with some form of fault diagnosis process to follow?
I'm happy to call-in an engineer if needed but, mindful of Coronvirus social distancing, I'd be equally happy to take a look myself if it's a basic/easy fix fault.
Many thanks in advance.
Over the last couple of days we seem unable to reduce the temperature of the radiators (there are no TRVs fitted). The eye level thermostat, made by acl, is located in the hall. I can hear it "click" when the knob is rotated to both reduce and increase temperature but it's not now affecting radiator temperature.
Could anyone kindly help with some form of fault diagnosis process to follow?
I'm happy to call-in an engineer if needed but, mindful of Coronvirus social distancing, I'd be equally happy to take a look myself if it's a basic/easy fix fault.
Many thanks in advance.