I have a Honeywell ST9100A installed in my airing cupboard, which works the underfloor heating, last night, as I lay in bed, I could hear a clicking noise, upon investigation it was coming from the Honeywell, the screen was also flashing on and off, any ideas?
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Honeywell ST9100A
- Thread starter carlbhoy
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Could be loose connection/faulty relay/output.
Just felt the unit and down the left side the casing is rather warm
- Joined
- 5 Nov 2024
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- 3,732
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- Country
Still as above, but possibly loose connection being warm
As above , it’s had it.
Thanks guys, guess I better get a new one, can anyone tell me what Honeywell model would fit the existing backing plate
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