Bathroom radiator won’t heat up/manual valve

[ajt2018]

Did you have to refill the heating system / did you notice the pressure drop when you did the test ?

Hi, in order to check the valves properly we disconnected the valves and drained the water from the radiator. After which we had to refill the system to replace the several litres of water which we drained out of the radiator. When we did the test we have bled water out of the radiator so that causes the pressure in the system to drop and we have refilled the pressure to the correct level using the filling loop on the boiler. The boiler was turned off when we did this test to prevent this from kicking in automatically, as it is cold outside. In the later part of the test we have put the boiler back on to test if the radiator gets hot which it isn't.

When you say did we notice the pressure drop when we did the test. Do you mean looking at the flow of water from the valve or the overall pressure in the system?

 

[ShaunCorbs]

That’s fine it’s not unheard of the bathroom rad being off the hot water side

 

[exedon2]

Just to be certain you say your boiler is a worcester heat slave it is a combi?
If that is the case heating flow going cooler when running hot would be normal.

 

[ajt2018]

That’s fine it’s not unheard of the bathroom rad being off the hot water side

Disconnect both sides of the rad and then open each valve in turn into a bucket/rubble sack to prove there is flow at both the flow and return.

Once done, reconnect the rad and bleed half the rad through the flow and half the rad through the return.

Then close all the other rads in the property leaving the problem rad open.

Report findings.

Just to be certain you say your boiler is a worcester heat slave it is a combi?
If that is the case heating flow going cooler when running hot would be normal.

Hi, yes it’s a combi boiler. We think it could be a problem with the boiler pump which after checking the receipts further looks like the original pump that was put in back in 2003, unless anyone has any other ideas we could try. Thanks

 

[ajt2018]

The flow pipe gets how but for some reason the radiator just isn’t getting hot.

 

[exedon2]

I see you indicated the return valve needed 2 1/4 turns before water came out that would be my main suspect.
I've seen some of the cheaper types of the rad valves like yours have non rising head works that can jam fully open or virtually closed.

 

[ajt2018]

I see you indicated the return valve needed 2 1/4 turns before water came out that would be my main suspect.
I've seen some of the cheaper types of the rad valves like yours have non rising head works that can jam fully open or virtually closed.

Hi, the reason we took the radiator fully off was so that we could see sideways into the valve. We could see that when turned the valves were opening and closing. The valves were atleast £30 so I wouldn’t say that they were cheap…

 

[ShaunCorbs]

Turn all the other trvs off and retest does that one heat up ?

 

[ajt2018]

Turn all the other trvs off and retest does that one heat up ?

Hi, someone already suggested that in the message chain above it didn’t work.

 

[ShaunCorbs]

Piping to the rad faulty if your getting flow from each side so never worked