Old Honeywell 4200 3879 001 Room Stat Replacement

[s3anreilly]

Room stat needs replacing as only clicks in above 25

T'is as old as yonder hills.

What could I replace this stat with?!

Thank you!

 

[ShaunCorbs]

Honeywell 6360b

 

[s3anreilly]

Replaced with 6360B but now the stat overrides the programmer... ie. the boiler does not respond to the programmer, is always on and only goes off when wall stat allows. Please advise!

 

[Harvest Fields]

Sound like you have wired the stat in wrong.

 

[ShaunCorbs]

It's exactly the same one as you've replaced so either you've messed with the wiring or you have a very old system

Prog controls boiler and gravity hot water and room stat controls pump

 

[s3anreilly]

seems to have sorted itself now... hmmm. There's gremlins in that there system. Checked wiring.. it may be the programmer needs replacing if it pops up again.

 

[Harvest Fields]

seems to have sorted itself now... hmmm. There's gremlins in that there system. Checked wiring.. it may be the programmer needs replacing if it pops up again.

Funny how that happens.