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Andrew Smith
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3591
Experience:  Gas cooker specialist
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We have a Honeywell T8617A1001 digital thermostat display which

Customer Question

We have a Honeywell T8617A1001 digital thermostat display which has just gone blank. This is NOT a battery opperated unit , it is wired to the mains. I have checked the fuse boarb and that hasn't tripped , and there is another switched fuse which has a light on (which has been accidently turned off before and does turn the display off ). Can you tell me if there is anything i can try to get display back ?
Submitted: 3 years ago.
Category: Appliance
Expert:  Anthony F. replied 3 years ago.

AnthonysTV :

Does the unit respond otherwise?

AnthonysTV :

there is a backlight lamp if the unit is BLACK LCD lettering chances are very good that lamp just blew

AnthonysTV :

usually a 6 to 12 V dc lamp

AnthonysTV :

not that big of a deal o repair if it uses this method

JACUSTOMER-yaaizgvm- :

I can't see backlight , anything else i can try , if not how do i re-list the question ?

Expert:  Andrew Smith replied 3 years ago.
If the fuse to the boiler is still ok (the boiler still has power) then your display is faulty and will need replacing.
Just to confirm if you have a multimeter we can check power to the unit?

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