Ideal Logic 30+ combi boiler - no heating

[Emmac2086]

Hi all,

Looking for some advice as to why my central heating is not working. We have recently moved 2 radiators, replacing one with a new one. When turning the boiler back on there is now no heating. We have hot water, we have checked the pressure, bled the radiators, reset the boiler.

We do not have a room thermostat, it is all done by the boiler control. The boiler ignites when switched on with the dial stating CH temperature set by room thermostat. It then starts saying the radiator temperatures which are at 90 degrees so the boiler then switches off.

Any idea what this could be?

Thanks

 

[townfanjon]

When moving the rads did you completely drain the system?

 

[ShaunCorbs]

I suspect you may have an air lock hence the boiler going into overheat safety

 

[Emmac2086]

When moving the rads did you completely drain the system?

Yes we drained the whole system
[automerge]1570904091[/automerge]

I suspect you may have an air lock hence the boiler going into overheat safety

Thanks, How would we go about clearing the air lock?

 

[Danb]

Have you got a
Magna clean on your system.?
If so try venting that

 

[townfanjon]

Have you moved any of the levers / valves under the boiler ?
We cant tell you to go into the boiler , but just try resetting it a couple more times it may move the air.

 

[ShaunCorbs]

You could try turning the heating temp down on the boiler rad symbol and leave it calling eg turn the programmer on you should hear the pump run

 

[garygvl]

by the sounds of it you have a prt3 programmer running the boiler. you say hw is ok so if boiler is running up to max temp on heating but you have no heating feel the far left pipe coming out of the bottom of the boiler, this is the flow to the heating is it getting hot. if not check the two black valves, far left and right, towards the back which are heating flow and return. the levers should both be facing upwards. when you have checked this get back to me

 

[Emmac2086]

by the sounds of it you have a prt3 programmer running the boiler. you say hw is ok so if boiler is running up to max temp on heating but you have no heating feel the far left pipe coming out of the bottom of the boiler, this is the flow to the heating is it getting hot. if not check the two black valves, far left and right, towards the back which are heating flow and return. the levers should both be facing upwards. when you have checked this get back to me

Hi, I have checked the valves, both are facing upwards. The left hand pipe is hot at the top of the pipe only. Any ideas? Thanks

 

[garygvl]

Hi, I have checked the valves, both are facing upwards. The left hand pipe is hot at the top of the pipe only. Any ideas? Thanks

Were the flow and return valves turned off when you drained the rads

 

[Scott_D]

Are all radiator valves open?

 

[Emmac2086]

Were the flow and return valves turned off when you drained the rads

No they weren't. We have drained all the system again so no air locks or anything. When the central heating starts up it reads the temperature of the radiators but it starts by saying it's at 68 degrees then 70 odd degrees then 90degrees then the boiler switches off.

 

[garygvl]

No they weren't. We have drained all the system again so no air locks or anything. When the central heating starts up it reads the temperature of the radiators but it starts by saying it's at 68 degrees then 70 odd degrees then 90degrees then the boiler switches off.

have you used the heating so far this autumn sounds like boiler is stuck in hot water mode and just circulating internally. if it is cant go any further on here and you would need to get gsr out to look at it