My Worcester combi hasn't been firing when I expect it to, so I tried to make sure the Honeywell CM67 was correctly programmed. Couldn't read instructions in lid so tried to take lid off, which came away with most of the programmer. Fitted programmer back into base, but display has gone blank. Changed batteries but still blank. Boiler stays silent even though set to ON for both HW and CH. What do I do next?
Honeywell CM67 gone blank
- Thread starter Bobski17
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Have you blown a fuse ?
Are batteries new and fitted correctly ?
Are batteries new and fitted correctly ?
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