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- 30 Nov 2023
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Hi all,
We moved into the house July 22 and, apart from the occasional top up, have had no issues with boiler, HW or CH. Recently, however, we've started having issues with the pressure on the boiler but only when only the HW is on.
What happens is that I can check the pressure all day long when the CH and HW are on and it will vary from 1bar up to 2.2bar but if there is a time when only the HW is on then the pressure will drop to near zero and I can hear bubbling noises in/near the HW tank. If I repressurise at that point then the bubbling goes away. CH works no problem. No obvious leaks anywhere.
For background:
I had one of the isolation valves on the filling loop replaced last week as it was leaking which I thought the cause of the drop in pressure but it's still happening.
The HW is also connected to two radiators in the bathrooms (so when HW is on those rads are on regardless of whether CH is on). There is never any air in these and they aren't leaking.
Worcester boiler - no more than 5 years old, single flow and return for both CH and HW
Any ideas on what's causing this? What I'm wanting to know is whether this is a simple fix that an engineer can do or if it's one of those "could be anything" sort of problems will it be cheaper to replace boiler or tank?
Cheers
We moved into the house July 22 and, apart from the occasional top up, have had no issues with boiler, HW or CH. Recently, however, we've started having issues with the pressure on the boiler but only when only the HW is on.
What happens is that I can check the pressure all day long when the CH and HW are on and it will vary from 1bar up to 2.2bar but if there is a time when only the HW is on then the pressure will drop to near zero and I can hear bubbling noises in/near the HW tank. If I repressurise at that point then the bubbling goes away. CH works no problem. No obvious leaks anywhere.
For background:
I had one of the isolation valves on the filling loop replaced last week as it was leaking which I thought the cause of the drop in pressure but it's still happening.
The HW is also connected to two radiators in the bathrooms (so when HW is on those rads are on regardless of whether CH is on). There is never any air in these and they aren't leaking.
Worcester boiler - no more than 5 years old, single flow and return for both CH and HW
Any ideas on what's causing this? What I'm wanting to know is whether this is a simple fix that an engineer can do or if it's one of those "could be anything" sort of problems will it be cheaper to replace boiler or tank?
Cheers
