Replaced radiator now boiler no CH but hot water

[bri0790]

I have had some damp proofing done and had to remove 2 radiators, and I have just had them re-fit. Heating was working up until the re-fit

Now, the boiler is providing hot water, but when trying to run CH, will fire up then immediately go into pump overrun, cycle repeat every 6-8 minutes.

One heater (the closest to the boiler) is on and hot, but no others in the house

Boiler is a Logic Combi + 24

 

[steadyon]

1. Sounds as if the one working radiator is taking all the heat and returning the water to the boiler so hot that the boiler cuts out.
2. Probably the balance of the system has been upset when radiators removed. Try this on both removed radiators:
2a. Each radiator will have a lock shield valve on one end, and either a wheel head valve or a thermostatic radiator valve (TRV).
2b. Close the lock shield valve (the one you have to remove the cap before turning with a spanner) fully, then open 1/2 a turn.
2c. Open the wheel head valve or TRV fully.
2d. Run the system.
3. If the above results in other radiators getting warm, then the system need balancing. Plenty of guides on the internet.