Heating Mystery

[Greg12]

My central heating is working when the timer and the thermostat show it to be off. The hot water is heating and the timer control panel shows no central heating at this time - yet the radiators are hot. Cannot turn the heating off as it thinks it is not on!!

Ideas?

 

[dextrous]

What sort of heating system have you got?

 

[Greg12]

I have a Baxi combination boiler and radiators controlled via a honeywell timer - is that sufficient info?

 

[dextrous]

I have a Baxi combination boiler and radiators controlled via a honeywell timer - is that sufficient info?

It helps a great deal TBH. Others will be along soon no doubt to help.

 

[kevplumb]

which model baxi

 

[Greg12]

It is a Baxi Solo HE

 

[namsag]

Thats not a combi...... do you have a cylinder

 

[kevplumb]

if the op says no your right in it

 

[Greg12]

Woops - demonstrating my ignorance here - I mean condensing not combi!! Show's that I need help!!

Yes, there is a cylinder in the airing cupboard ........

 

[namsag]

KEV
Faulty motorised valve stuck open and microswitch inside made giving power to boiler and pump even with clock and stats set to off

 

[dextrous]

To further quote kev - faulty one of these:

Untitled

• dextrous
• 3 Oct 2009
• 1

 

[Greg12]

Thanks guys

Could it be anything else though? The switch was replaced only a couple of months ago so would another one get stuck??

 

[doitall]

What is the make/model of the 3port valve.

On some the arm bends.

 

[dextrous]

Thanks guys

Could it be anything else though? The switch was replaced only a couple of months ago so would another one get stuck??

Was the valve changed due to similar symptoms?

 

[proffessorplumb1]

you may also have a faulty frost stat, which will by-pass all timing controls