Extremely loud banging from central heating in morning

Joined
13 Jan 2005
Messages
20
Reaction score
1
Country
United Kingdom
Hi,
So for the last few days as it's been cold, when the heating first comes on at 7am, there is an almighty banging noise. The pipes have always banged and ticked a bit with the heating, but this is 100 times noisier. We seriously thought someone was downstairs doing some sledgehammering. Same this morning.

So I've bled the rads - no air, and also checked the pump - undone the bleed screw and checked the spindle was free, which it is. I did think the pump had gone as it's probably 10 years old, but it's v quiet just humming. The banging happens about 2 mins after the timer comes on, but then the rads do heat up, and the pipes don't then make any noise.

The system is open vent with a tank in the loft, and Potterton Suprima 30 boiler (don't ask), regularly serviced. The rads are old and fairly sludgy, but the system was flushed last year. Pump is a Pegler "Terrier TC6".

Anything else I can try before getting a heating eng on the case?
 
Sponsored Links
Joined
13 Jan 2005
Messages
20
Reaction score
1
Country
United Kingdom
I hate threads that are started and never completed.
So... I got a heating eng. out. Sod's law - the banging didn't happen. This was the day after I had bled the rads, but it had banged after that. But it didn't happen while he was here, and didn't happen today either so I think it must have been a massive air lock that has now found its way out the system. In fact the pipes are quieter than before...weird!
 
Joined
9 Apr 2008
Messages
675
Reaction score
65
Location
London
Country
United Kingdom
Hope your right.
It still could be a fault with the gas ignition if this almighty bang returns.
 
Joined
8 Apr 2008
Messages
10,701
Reaction score
2,700
Location
Essex
Country
United Kingdom
If the pump is wired into the boiler (as it should be) it is probably a boiler pcb fault.
 
Sponsored Links
Joined
13 Jan 2005
Messages
20
Reaction score
1
Country
United Kingdom
Joined
13 Jan 2005
Messages
20
Reaction score
1
Country
United Kingdom
OK so this happened again a few weeks ago. Got the pump replaced and it's been fine since.
 
Sponsored Links
Top