Boiler Running Query

[Scott83]

Hi

Need a little bit of advice as I can’t find out an awful lot about this boiler online.

I have a Worcester 240 Combi boiler (very old I know) and I notice that it seems to ignite and burn for approximately 30 seconds before turning off for about 2 minutes and then repeating the process again.

Is this normal for this type of boiler or is this indicating some type of fault.

Radiators and hot water all working okay.

Thanks

 

[xd400]

Depends on the temperature and what the thermostat is calling for. There is a lag between the thermo setting and the boiler turning off. How often is this happening?

 

[Scott83]

Depends on the temperature and what the thermostat is calling for. There is a lag between the thermo setting and the boiler turning off. How often is this happening?

I have the boiler temperature up at 4 (think there’s 6 settings) and there’s no room thermostat just TRVs on each radiator.
It runs that way pretty much until all the radiators have gone up to the required TRV setting.
The thing is this doesn’t happen often just now due to the cold snap and the fact my house is open plan down the stairs doesn’t help.

 

[Dereekoo]

And does this happen straight away or when the system has been running for a while and all the radiators are hot. Try putting boiler stat up a notch. I assume one of the radiators does not have a TRV setting so flow through the system is not blocked off completely at some point in the heating cycle

 

[Scott83]

And does this happen straight away or when the system has been running for a while and all the radiators are hot. Try putting boiler stat up a notch. I assume one of the radiators does not have a TRV setting so flow through the system is not blocked off completely at some point in the heating cycle

When it first comes on it ignites, fires up and then it’s about 8 or so minutes before it ignites again. Then from there’s it’s pretty much the 30 seconds ignite and firing then 2 minutes break.
There’s 6 radiators in total - 3 down stairs and 3 upstairs and they all have TRVs.
I’ve not longed moved in so was hoping the boiler would at least get me through the winter before getting a new modern one. As I say I know it’s a really old one so was just unsure how it runs. Also it’s up stairs in the spare bedroom which I found strange.

 

[spile]

A modern boiler would be a worthwhile investment and reduce your bills in my opinion.

 

[Dereekoo]

When it first comes on it ignites, fires up and then it’s about 8 or so minutes before it ignites again. Then from there’s it’s pretty much the 30 seconds ignite and firing then 2 minutes break.
There’s 6 radiators in total - 3 down stairs and 3 upstairs and they all have TRVs.
I’ve not longed moved in so was hoping the boiler would at least get me through the winter before getting a new modern one. As I say I know it’s a really old one so was just unsure how it runs. Also it’s up stairs in the spare bedroom which I found strange.

Bang boiler stat up to 6 and see if that works in the short term but sounds like its time for a new boiler

 

[Johntheo5]

Hi

Need a little bit of advice as I can’t find out an awful lot about this boiler online.

I have a Worcester 240 Combi boiler (very old I know) and I notice that it seems to ignite and burn for approximately 30 seconds before turning off for about 2 minutes and then repeating the process again.

Is this normal for this type of boiler or is this indicating some type of fault.

Radiators and hot water all working okay.

Thanks

Most gas boilers fire up at up to 70% of their max output and maintain this for anything up to 60 secs before releasing the controls to modulation, once the boiler flowtemp exceeds the target (SP) temperature by, normally, 5C, then the burner stops firing and the circ pump just keeps running until the anticycle time finishes, then the burner refires again.
When this happens again, suggest increasing the target flowtemp by say 10C or so and see does the burner continue firing, if so, you can probably increase that anticycle time which seems to be 2 minutes now to say 4 minutes, this allows the boiler return temp to fall further before burner refiring and hopefully not reach its target temp + 5C before cut out (return target temp to its original before increasing the anticycle time). Of course, if the rad demand is less than the boiler's minimum output then the boiler will recycle which is quite normal.

 

[Madrab]

No, the boiler should run until the systems up to temp and once the return temp reaches a certain level then the boiler can/will cycle as the system temp swings up and down.

At least get it serviced by your local independent and get them to have a look at it before condemning it. Unfortunately a lot of the key parts are now obsolete which is usually the main driver for replacement but it could be something as simple as a sensor which may still be available.

 

[Scott83]

No, the boiler should run until the systems up to temp and once the return temp reaches a certain level then the boiler can/will cycle as the system temp swings up and down.

At least get it serviced by your local independent and get them to have a look at it before condemning it. Unfortunately a lot of the key parts are now obsolete which is usually the main driver for replacement but it could be something as simple as a sensor which may still be available.

Thanks for that - I’m going to look to get it serviced. Have only just moved into the area so going to ask about for someone reliable.

Having had a further read it sounds like short cycling - it is a really old boiler so maybe just come to the end of its life.