Horstmann thermostat display flashing

[Baker]

Morning,

I have a Vaillant combi boiler coupled to a Horstmann programmable room thermostat - DRT2 I think.....it is square, has an LCD display, 2 rubber buttons under the display for up and down and to,the right of the display 5 rubber buttons with D, M, H etc

it hasn't had batteries in it for a few months (over the summer) and I went to put batteries in it this morning and the display just keeps flashing. I have pressed the recessed reset button with a paper clip and tried 3 sets of new batteries but still it just flashes. It doesn't allow me to change time etc.

any ideas as to what the issue is?

Many thanks,

Cliff

 

[Last Plumber]

Have a look for manual on line unless you kept it.
I can't think why it would not reset with new batteries but it may tell you in the manual

 

[Baker]

Thanks for reply.

Tried all that, it simply said press reset button which I have done. No change.

There is no trouble shooting in the manual that says about the lcd display flashing.

Any other thoughts?

 

[Last Plumber]

Sorry, I can't think of any.
Replace it ? That's what I would probably do

 

[Baker]

Was hoping it may not come to that....only been in use for a couple of years.

What thermostat would you recommend? It needs to be programmable and ideally with 2 time slot options (morning and evening) for 7 days a week.

Hope you don't mind me picking your brains further ;-)

Cheers.

 

[Last Plumber]

Honeywell.
Have a look on line to see it does what you want

 

[snowhead]

It had NO batteries in over the Summer?

It may be the internal battery that keeps the memory while you change batteries, it may or may not be removable/ replaceable.

Leave it alone for a few hours and see if it sorts itself out.

 

[Baker]

Thankyou I will try that option.

 

[Gasmk1]

is it not wired have you put the power back on
http://docs-europe.electrocomponents.com/webdocs/0107/0900766b80107b1d.pdf

 

[Baker]

That link took me to a different version. I found that when I googled things earlier too. My description of mine is above re layout of buttons.

There is power there but when I pop batteries in the screen just flashes I can't program it with times etc.

Cheers for your reply though