New Combi system problem

[copperpipe]

Hello, just had a combi system put in, new pipes, rads and Baxi 105e boiler. System kicks in on timer or on constant, all the rads heat up fine (although I feel they get too hot) stay on for around 15mins then the boiler shuts off and rads go cold and so does the house. the system comes back on when the house is freezing by this time we are shivering. Anyone reckon the boiler is overheating (no warning lights etc come on) and the bolier thermo is always between the correct bars or the wall thermostat is knackered. what do you reckon I should have the wall thermo set at it runs from off to 30 degrees currently on 25 degrees.

Thanks for your help

 

[boilerbeasty]

Get the installer back to fix this problem. If you've just paid for a new system to be put in, it should work !

 

[nige]

i have just had a new combi if i have my thermostat below 22 all my heating goes off i run mine at 25-28,

 

[breezer]

havent got a rad under the stat have you?

 

[ChrisR]

What make/model is the wall stat. Take its cover off and look inside. How many wires are connected - excluding any earth which is ON an earth connection?