Help !!!! Combi problems

[Steve Pearsall]

Sorry guys it’s a 30Si

 

[MeldrewsMate]

Isn't the 30Si a system boiler?
Perhaps you could start again and describe the problem in more detail.
1. How many copper pipes come out of the (bottom of the) boiler? A photo or two maybe?
2. Do you have a timer for HW and CH?
3. Do you have a hot water cylinder?
4. What actions do you take when there is no hot water, and do the actions you take restore hot water flow almost immediately?
5. When it does run, does it continue to run/fire the whole time you are drawing hot water?

 

[Steve Pearsall]

Hi. I’ll put some pics up. The pipes coming to/from the boiler are as follows. Rad feed in and out. Mains cold in and hot water out and gas.
We don’t have a tank
When it does fire up it’s only for maybe 20seconds. This gives me a little hot water and then the residual from the heat exchanger

 

[Steve Pearsall]

Ignore the pic of the bed lol

 

[bernardgreen]

I wonder if the recent hot weather and it's affect on ambient air density has taken some boilers out of their "comfort zone" ?

At 30°C air density is about 5% lower than the density at 15°C

Would this lower air density and high ambient air temperature affect the boiler and maybe cause the boiler to shut down ?

Some manufactures specify a maximum altitude for their boilers ( typcally 1000 metres ) or require an altitude adjustment to be made to ensure the boiler operates correctly at the lower air density at the higher altitude..