Honeywell central heating timer

[morristhemoose]

Hi

My central heating timer ST799 has the "hot water" red light lit constantly,
and will run the boiler likewise.

"Heating & hot water" still does control.

Disconnecting the hot water tank termostat has no effect.

The clock setting is still working.

Grateful for any troubleshooting ideas.

Many thanks


Morris

 

[spacethegas]

have you just fitted the programmer or has this fault just suddenly developed ?

 

[morristhemoose]

Thanks for the reply

No, it's been going for years then suddendly started staying on for an hour morning and evening, now it's all the time.
I have to turn to power off to stop boiler running.

Removed timer unit and had a "look" all seems okay

Don't want to splash out on an expensive unit and it was someting simple.

Thanks

 

[spacethegas]

new programmer i'm afraid. they are prone to doing strange things.
about £60.

 

[morristhemoose]

Many thanks your advice, I will you know what the outcome is!
£60 ouch!

 

[spacethegas]

if that turns out to be the fault £60 is not ouch.
if you had engaged my services you would be paying more than double that.
£60 cheap as chips

Untitled

• spacethegas
• 8 Aug 2008
• 2