Successfully fixed Drayton Tempus 7

The usual press time+ and select wasn't working, the battery inside would prevent a full reset so this procedure does a total system reset.

Mains off Unscrew with flat screwdriver the holding screw at the bottom of the unit lift unit off backing plate pulling the bottom towards you using a thin knife or a screwdriver lift off the back panel to expose the circuit and the round backup battery with a small bit of metal ie your screwdriver breifly touch the contact below the battery to the outer case of the battery ( temporary short ) replace the cover, the unit is now reset to default ( you should be able to see the display working again if you hold it at a angle ) place back on wall tighten screw turn on mains

Reply to
Bob
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Thanks very much - this worked perfectly

Reply to
carps

Reply to
clairecarpenter63

But why did it get confused in the first place. Maybe dodgy battery connections or borderline battery?

Brian

Reply to
Brian Gaff

I bloody love the internet, was having problems with my heating starting up (Micron70FF), then when resetting the controller by turning off the power t o reset a lockout error the display went screwy showing 10EE. Tried taking apart and was going to replace when I saw Bob's post. You are a star as it worked for me, I think the battery needs replacing but as it only used when the power goes off I'll risk it for now. Cheers Bob

Simon

Reply to
bayley64

Reply to
Brian Gaff

The battery on mine was old and this was the cause of the corruption, the b attery is a CR2032 which is soldered vertically into the PCB so no way of d isconnecting it. I have now taken out the old battery and replaced with a n ew one(available from Farnell). One issue is that the program appears to ha ve changed in that when the heating is turned on the hot water comes on as well! Oh well at least it works.

Reply to
bayley64

There are two Select buttons. Which one to press with Time+?

Thanks Mian

Reply to
wei.mian04

Thanks Bob. Worked a treat and house is now warm again.

Reply to
b.rietti

Bingo, it worked in spite of my heating engineer telling me it wouldn't. So saved over £100. To remove the back on mine I needed to udo four screws, two of which were hidden beneath labels.

Reply to
dgpearson42

We don't know what worked though. Brian

Reply to
Brian Gaff

Sorry. Shorting the battery solved the problem.

Reply to
dgpearson42

This is so true..I have just fixed mine ..but had to remove those two labels as well...thank you for pointing this out. one label explains whether it is gravity or pump and is L shaped and the other describes the model and is larger,,,thank God for google !!!

Reply to
chrisbous

My timer and boiler are working perfectly now !

Reply to
chrisbous

And thank you Bob ever so much for letting us all know how to fix our timers !!!

Reply to
chrisbous

Reply to
chrisbous

So what is the culprit that causes the issue in the first place, corrosion of the battery connections perhaps? Brian

Reply to
Brian Gaff

On my Honeywell, the rechargeable battery simply failed through age - and likely a crude charger. Simple enough to solder in a new one. These days I'd expect Li-Ion, which with a decent cell and charger should last the life of the device.

Reply to
Dave Plowman (News)

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