- Joined
- 16 Jan 2008
- Messages
- 2
- Reaction score
- 0
- Country
I am a first time poster here and hoping for some advice.
We have an 8 year old 28CDi boiler.
Occassionally, when it is turned on, either for CH or HW, I hear loud knocking noises.
Then the lights would flash and the little valve on top of the boiler would emit some hissing smelly steam.
I would then press and hold the reset button. Sometimes, the flashing lights would stop and it would return to normal. Other times, I have to turn it off and on several times on the power dial before it would work normal again.
When the central heating is running, I can turn on the hot water and it will be fine. The problem only seems to occur when the system is being turned on, but not necessary from cold. It could be on auto, and the CH had just gone 5 minutes ago, then if you turn on the HW, the problem occurs.
The pressure is fine and not even near the minnimul (1) level.
It only had a service last month and they replaced the expansion vessel and heat exchanger because I had to repressurise it daily.
Can anyone suggest what may be wrong?
Thanks in advance.
We have an 8 year old 28CDi boiler.
Occassionally, when it is turned on, either for CH or HW, I hear loud knocking noises.
Then the lights would flash and the little valve on top of the boiler would emit some hissing smelly steam.
I would then press and hold the reset button. Sometimes, the flashing lights would stop and it would return to normal. Other times, I have to turn it off and on several times on the power dial before it would work normal again.
When the central heating is running, I can turn on the hot water and it will be fine. The problem only seems to occur when the system is being turned on, but not necessary from cold. It could be on auto, and the CH had just gone 5 minutes ago, then if you turn on the HW, the problem occurs.
The pressure is fine and not even near the minnimul (1) level.
It only had a service last month and they replaced the expansion vessel and heat exchanger because I had to repressurise it daily.
Can anyone suggest what may be wrong?
Thanks in advance.