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JamesI, Developer
Category: HVAC
Satisfied Customers: 5763
Experience:  I have a portfolio of renovated houses, including DIY projects from installing bathrooms and new heating systems to rewiring.
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The thermostat for our Vaillant boiler has stopped working

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Hi, the thermostat for our Vaillant boiler has stopped working and therefore we have no heating. We are getting a new one but in the mean time is there a way of overriding it? Thanks, Lioba
JA: What's the brand and model of your thermostat? How old is it?
Customer: Not sure how old, just trying to find it now
JA: What have you tried so far with your thermostat?
Customer: I can't find it as I have a small baby who may have put it somewhere?
JA: Anything else we should know to help you best?
Customer: the boiler is a valiant eco tech pro 24

Hi Lioba, thank you for choosing Just Answer, my name is ***** ***** I will help with your query today.

So you have a wireless thermostat?

Customer: replied 6 months ago.
Customer: replied 6 months ago.
Please answer via internet

Ok what is the model of thermostat (Honeywell?)

Customer: replied 6 months ago.
How long before i can get a reply?
Customer: replied 6 months ago.

It can take some time for an expert to respond, can you cofirm if you have a honeywell thermostat?

The first thing to do is go to the boiler can you see a small box on the wall with a wire going to it, it will likely have two lights and a button. This will be the wireless thermostat receiver, tell me what lights are showing on it.

Customer: replied 6 months ago.
Customer: replied 6 months ago.
just trying to find it now
Customer: replied 6 months ago.
it says drayton digistat

ok, I will do my best to respond when you reply but it can take some time.

Customer: replied 6 months ago.
the wireless receiver just has a red light on next to where it says alarm
Customer: replied 6 months ago.
It says override and has two bottons labelled 1 and 2 (learn mode)

Ok press the override button once the light should come on, and the boiler should start.

Let me know how you get on.

Customer: replied 6 months ago.
You're not being clear. There are two buttons 1 and 2 next to override I don't know which one to press thanks

One should be next to override, if your not sure press each one once.

Without knowing the model of the missing thermostat its hard to know the exact receiver you have fitted.

Customer: replied 6 months ago.
ok there's a green light next to on now

Ok give it 30 seconds and let me know if the boiler starts up.

Customer: replied 6 months ago.
it hasn't unfortunately :-(

What is showing on the boiler display and is the light still showing on the receiver?

Customer: replied 6 months ago.
green light on the receiver
Customer: replied 6 months ago.
it says 1.2 on the boiler and a green light

Ok on the receiver did you press the 2 button?

Customer: replied 6 months ago.
both 1 and 2

Ok if you press 1 and 2 again does the light go off?

Customer: replied 6 months ago.
hello, something seems to be up with this conversation.. technical glitch?
Customer: replied 6 months ago.
I said yes to the above question

Ok I only got the message sent at 8:12 and 8:13.

Ok if you now press just button 1 and the light comes on what is shown on the boiler?

If the boiler doesnt come on the override feature isnt working and you will need to replace the thermostat to get this working.

Is there anything else I can assist you with?

Customer: replied 6 months ago.
The light doesn't come on when I just press 1 so you think that the override feature isn't working?

Correct if the boiler isnt starting there is a fault with the boiler getting the call for heat signal.

Customer: replied 6 months ago.
Okay, well I guess you can't help anymore then. Thanks

You can get a new stat from screw fix today they are open to late.

See the one here.

JamesI and other HVAC Specialists are ready to help you
Customer: replied 6 months ago.
Thank you, ***** ***** have to speak to my landlady again