Honeywel ST6400S

[soman]

Hi all

I hope there is someone out there who can help me out. My Honeywell ST6400C programmer has gone wrong so being a tight git I found one on ebay brand new !! result.

Except its a ST6400S and this means it has a service interval and service mode for landlords and local autorities etc. I have tried to find out how to enter the service mode and disable this function from Honeywell but it must be top secret info as they won't tell.

So if there is some good hearted soul out there who can tell me how to enter the service mode I would be grateful..

Cheers
Soman

 

[45yearsagasman]

The codes for these tiresome programmers are only obtained from Honeywell.