Central Heating Not Working

[hoyboy]

Help. My central heating keeps going on and off for no apparent reason and I'm getting cold.

I have a Vaillant ecotec pro with a timeSWITCH 140. The boiler is set to be on and the thermostat is turned up but the boiler just doesn't come on. If I push the 'i' button it displays S30 No heating demand from external controls (clamp 3-4 open).

That said, it was on last night and seems to work on and off intermittently.

Could the thermostat bit bust? Is there any way to test that?

 

[Gas2Air]

Link it out.

 

[hoyboy]

How?

 

[Gas2Air]

Either in the stat or at the pcb. But

 

[hoyboy]

sorry, I'm just a DIYer. Can you explain really clearly? i guess I should just pay someone to come out and take a look... Not good timing...

 

[Madrab]

Can you over-ride the programmer and does the CH stay on?

 

[Gas2Air]

sorry, I'm just a DIYer. Can you explain really clearly? i guess I should just pay someone to come out and take a look... Not good timing...

Yes you should pay someone. What job do you do?

 

[JBPHS]

How?

Sorry mate, but you need to seek professional help before you cause any injury.

 

[mogget]

How?

How experienced are you with heating controls? If you don't have the foggiest idea how they work then don't touch. But a professional will at least be able to keep you warm over christmas.

 

[hoyboy]

Thanks all. I got an engineer in. It was a faulty receiver. All sorted now.