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Hi ,
We had an problem with our Worcester 49 CDI system boiler just before Christmas .
Basically the fault was the temperature was rising too quick and it would error out .
I did a bit of research and spoke to Worcester and it pointed to the PCB .
Plumber came and assessed and said he thought it was a faulty zone valve .
He told me it would be best to get rid of of the y plan set up and advised to change to an s plan with added expansion for the heating .
We have a tempest pressurised cylinder upstairs .so he got rid of the small water tank in the attic and got rid of the zone valve and added 2 valves ,1 for water and 1 for heating .
Basically , we still had the same original fault .
After several visits I persuaded them to bite the bullet and change the PCB .
This sorted the original issue .
The heating side now seems a lot better ,much warmer and heats up quicker .
The problem now is that we started getting water coming out of the tundish .
After a few plumber visits it turned out to be a faulty new eph zone valve .
The trouble is that before finding this a new incoming control valve was changed and the cylinder tprv , obviously this all costs money .
The bill up to now was around £1300.
Everything seemed fine but I noticed the hot water pressure was crap .
After speaking with the plumber he had turned down the combi valves pressure to 1.5 bar to stop a slight drip at the tundish .
If the valve is turned up to 3bar the water pressure is fantastic but we do get a slight drip .
My reason for posting is that we are still having issues , the heating side is great but the hot water side is very noisy .
Basically when the boilers fires up to heat the tank it sounds like there is a lot of air and there's a lot of swooshing noise , this wakes us up in the morning .
Once the pump is running and things are getting warmed up the pump is making a crackling sound and this wakes us up as well . There isn't anything else to change , they even put a new thermostat in the tank .
Up to now the boiler had a new PCB , tank had 2x new zone valves , thermostat, combi valve , tprv valve and an expansion for the heating .The Grunfos ups pump is brand new .
The only thing not changed is the expansion vessel for the hot water but that's to spec and is only 2 years old
An old air separator was removed and auto air vents added in its place .
Can anyone help or offer any advice as to why we are getting the noisey pump on the hot water side and the sound of air ,it's driving us mad .
The heating side is fine and the pump runs silent when heating is on ,it's when the hot water is on that the noise occurs .
I'm close to getting it all ripped out .
The plumber is G3 qualified .
It's really annoying as the original fault was only a PCB error .
Thanks for any input
We had an problem with our Worcester 49 CDI system boiler just before Christmas .
Basically the fault was the temperature was rising too quick and it would error out .
I did a bit of research and spoke to Worcester and it pointed to the PCB .
Plumber came and assessed and said he thought it was a faulty zone valve .
He told me it would be best to get rid of of the y plan set up and advised to change to an s plan with added expansion for the heating .
We have a tempest pressurised cylinder upstairs .so he got rid of the small water tank in the attic and got rid of the zone valve and added 2 valves ,1 for water and 1 for heating .
Basically , we still had the same original fault .
After several visits I persuaded them to bite the bullet and change the PCB .
This sorted the original issue .
The heating side now seems a lot better ,much warmer and heats up quicker .
The problem now is that we started getting water coming out of the tundish .
After a few plumber visits it turned out to be a faulty new eph zone valve .
The trouble is that before finding this a new incoming control valve was changed and the cylinder tprv , obviously this all costs money .
The bill up to now was around £1300.
Everything seemed fine but I noticed the hot water pressure was crap .
After speaking with the plumber he had turned down the combi valves pressure to 1.5 bar to stop a slight drip at the tundish .
If the valve is turned up to 3bar the water pressure is fantastic but we do get a slight drip .
My reason for posting is that we are still having issues , the heating side is great but the hot water side is very noisy .
Basically when the boilers fires up to heat the tank it sounds like there is a lot of air and there's a lot of swooshing noise , this wakes us up in the morning .
Once the pump is running and things are getting warmed up the pump is making a crackling sound and this wakes us up as well . There isn't anything else to change , they even put a new thermostat in the tank .
Up to now the boiler had a new PCB , tank had 2x new zone valves , thermostat, combi valve , tprv valve and an expansion for the heating .The Grunfos ups pump is brand new .
The only thing not changed is the expansion vessel for the hot water but that's to spec and is only 2 years old
An old air separator was removed and auto air vents added in its place .
Can anyone help or offer any advice as to why we are getting the noisey pump on the hot water side and the sound of air ,it's driving us mad .
The heating side is fine and the pump runs silent when heating is on ,it's when the hot water is on that the noise occurs .
I'm close to getting it all ripped out .
The plumber is G3 qualified .
It's really annoying as the original fault was only a PCB error .
Thanks for any input