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Honeywell 7 day programmer fault

View the thread, titled "Honeywell 7 day programmer fault" which is posted in UK Plumbers Forums on UK Plumbers Forums.

B

bobb

Hi has anyone come across this fault i have just come accoss on a Honeywell ST9400C 7 day programmer. On the main display just says "IDLE".
I took the unit off the backplate but it just says the same. No buttons are responding.
Many thanks Bobb
 
There was a batch of dodgy honeywell programmers I while ago. There was a big recall.
 

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