Gloworm Flexicom 18sx CH issue

[Dave Stubbs]

Hi

I have an issue with the CH system on my Gloworm Flexicon 18sx.

The CH system will not run despite the thermostat calling and the controller showing the green indicator light to run.

Hotwater system runs and controls fine.

Any ideas ?

 

[CBW]

Do you have “state” codes? Or status? Do you have a zone valve(s) or 3 port valve?

 

[Dave Stubbs]

Where will I find the state codes ? think its a 3 port please see photo

 

[CBW]

Looks a bit like a diverter valve. Codes would be on display on front of boiler. Not sure if the cover is supposed to be removed by a non gas engineer on this model though.

 

[Dave Stubbs]

No Codes displayed on the boiler display unfortunately

 

[CBW]

Press the minus button for >5 seconds, should flash with a s code

 

[Dave Stubbs]

S 30 is flashing

 

[CBW]

Ok, so that’s usually an indication of the thermostat not calling. Which thermostat do you have?

 

[Dave Stubbs]

Its a Honeywell

 

[CBW]

Its a Honeywell

Care to elaborate on a model?

 

[Dave Stubbs]

Think its a T6360B1028

 

[CBW]

You could try testing the thermostat if you have a voltage tester or multimeter? Likely the diverter or zone valveif you have One?

 

[stem]

A bit difficult to see properly due to the cobwebs, but is there actually a wire connected to the live supply to the thermostat? (terminal 1) I can't see anything in there.

If there is a wire in terminal 1, and you were to insert a wire to link terminals 1 and 3 together, that by-passes the thermostat and if the heating comes on then, the thermostat is faulty.