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?
Honeywell ST9100A
- Thread starter carlbhoy
- Start date
- Joined
- 5 Nov 2024
- Messages
- 2,739
- Reaction score
- 1,474
- Country
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
- Messages
- 2,739
- Reaction score
- 1,474
- 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
Last edited:
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
