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How do I unlock this thermostat?

Rosa_Damascena
Posts: 7,007 Forumite



This clearly needs programming, but before that I need to rid of the display padlock. I am going through my paperwork to find the manual but have tried random combination of the buttons on the panel (in much the same way as I do when resetting the clock on my oven!) with no luck.
This was working when it was installed 2 years ago, but the truth is no haven't used this zoned area and despite having a separate radiator powered with the main heating system the room is today feeling distinctly chilly! My attempt to activate the UFH is a failure
Can anyone help?
This was working when it was installed 2 years ago, but the truth is no haven't used this zoned area and despite having a separate radiator powered with the main heating system the room is today feeling distinctly chilly! My attempt to activate the UFH is a failure

Can anyone help?
No man is worth crawling on this earth.
So much to read, so little time.
So much to read, so little time.
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Comments
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Take a clear face-on pic, and do a Google images search. You'll almost certainly find it that way.
Then, 'instructions'!0 -
ThisIsWeird said:Take a clear face-on pic, and do a Google images search. You'll almost certainly find it that way.
Then, 'instructions'!
Try pressing two right buttons togetherhttps://www.youtube.com/watch?v=Gc9o7ww4L_s - looks similar
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Thanks for the effort you put into this @grumbler - tried this w/o success. Am convinced it is a Honeywell but there are umpteen models out there and can I find the darned instructions?! No....No man is worth crawling on this earth.
So much to read, so little time.0 -
If it's realy HC90, then it's 'HeatCom Corporation', not Honeywell1
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Press and hold the second button from the left for 3 seconds (or maybe slightly longer). That might remove the lock.
Any language construct that forces such insanity in this case should be abandoned without regrets. –
Erik Aronesty, 2014
Treasure the moments that you have. Savour them for as long as you can for they will never come back again.1 -
Instructions for the HC90 are here:Section 7.3 says that pressing and holding the return key for 3 seconds activates the lock.It does not mention unlocking, but I'd put money on it being the same process as as locking.......
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Thanks @FreeBear but no dice. When I work it out I shall post the answer!No man is worth crawling on this earth.
So much to read, so little time.0 -
Press & release the ON/OFF to turn the stat on then press/hold the return key for >3 secs to unlock?Signature on holiday for two weeks1
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Do you know if it's WiFi, Rosa? It doesn't appear to be.
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What happens if you press - or press-and-hold - the LH 'O' button?
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