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SassySue 11-25-2007 10:02 AM

Central Heating Frustration
:furious: Hello,
I'm sat in a freezing cold house, frustrated as my Central Heating really has me & the Plumber baffled.

In the Kitchen is a Gas Protherm Combi Boiler for my Hot water & Heating.
The Boiler is operated via a Horstmann Centaurstat themostat located in the dinning room.

The Centaurstat is programmed to turn the heating on at four different times: morning, daytime, evening & night at different temperatures.

In the morning the radiators are hot as programmed which is great.
However the problem is in the evening when the radiators never seem to get warm. I manually try turning up the temperature on the centaurstat, this overriding the programmed temperature of 22 dc, thinking this will fire up the boiler & provide heat, but it doesn't & the boiler doesn't seem to fire up. I wondered if maybe the communication between the boiler & the themostat was faulty.

Sometimes the radiators do come on, they start to become warm then suddenly after about 10 - 15 minutes they cool down when neither the themostat or the boiler has being touched.

I don't know whether it might be the themostat that is faulty, the boiler or the radiators.

The pressure in the boiler is as it should be between 1 & 2 bar (-as stated in the instruction manual).

Last night I decided to do nothing & see if the heating would come as programmed for 4pm. It didn't. It was 9pm before the radiators started to get hot.
Funny how it works on the morning but not on the evening.

I know I will have to call someone out to find / fix the problem eventually, although I'm reluctant because I was ripped off last week by another engineer who didn't fix another problem, he made it worse. What a month I'm having!
This is proving to be an expensive end to the year.

If anyone can provide some insight into this problem I'd very grateful indeed.


P.S. I don't believe this, I've just touched the radiators & they're piping hot!?
The heating has decided to come on now :confused1:

Ron6519 11-26-2007 12:25 PM

Does the thermostat have batteries? If they're weak the boiler could not work properly. Another issue is the programming in the thermostats. Check to see if they're programmed correctly.

SassySue 11-28-2007 03:03 AM

Central Heating
Yeah I've checked the Thermostat batteries & programme times already.
Think it might be an electrical fault on the boiler, a lose connection. I have to turn the boiler off & On to get it to fire up when the thermostat says so.

Thanks for taking the time to reply,

LawnGuyLandSparky 11-28-2007 03:11 AM

What is the setback temp? IE - the temperature you want the house to "cool off" to when you're not scheduled to be home?

SassySue 11-29-2007 06:46 AM

Setback Temp
The set back Temp is set to 18c when not at home.
Funnily enough the heating seems to be working ok now. Comes on as timed to the correct temp.
I think it was due to switching the boiler on & off a couple of times last week.
Fingers crossed it stay working.
Thanks for taking the time to reply.

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