Why is downstairs radiator not working?

[veedee]

That’s an erp pump, don’t think you can get to those screws. X2 flow pipes or return pipes plumbed in by accident?

Can erp pumps be freed if they are seized?

If so, how do you do this?

 

[terryplumb]

I see in pics that you do have a TRV ,press down on the pin to see if it moves freely up and down.

Does it ???

 

[veedee]

I see in pics that you do have a TRV ,press down on the pin to see if it moves freely up and down.

It moves very freely

 

[terryplumb]

Is the central heating system pressurised / sealed ,or fed from an expansion tank ?

 

[CBW]

Just uploaded pics in previous post

They weren’t there the first time I looked.

 

[CBW]

Can erp pumps be freed if they are seized?

If so, how do you do this?

I’m not sure how you free them, but wouldn’t have thought it were seized.

 

[CBW]

I then drained down the system and one pipe got warm but the other is ice cold.

Which pipe got warm?

 

[veedee]

X2 flow pipes or return pipes plumbed in by accident?

This is what concerns me that the plumber has made a mistake with the plumbing

1. I have bled flow and return to free up potential airlock

2. Removed trv head and verified that it moves freely

3. Drained down system

4. Shut off other rads except the problem rad to force heat/water to the rad

Still no joy. Is there anything else?

 

[veedee]

Which pipe got warm?

The top pipe in the attached pic.

This pipe connects to the drain off and trv end of the rad

 

[terryplumb]

Is the central heating system pressurised / sealed ,or fed from an expansion tank ?

Which is it ??

 

[CBW]

Which is it ??

Sealed or combi - 3bar prv next to pump on post #1.

 

[veedee]

Which is it ??

I have a combi boiler system

 

[terryplumb]

Sealed or combi - 3bar prv next to pump on post #1.

Thanks Chris ,missed that.

 

[terryplumb]

Fit the actuator head onto the Trv and turn it off. Leave lockshield fully open . Have a large container handy and open the air bleed valve ,let water run into container for 5 minutes ,have a second person topping up pressure. See if this shifts any air trapped in the return pipework.

 

[veedee]

Fit the actuator head onto the Trv and turn it off. Leave lockshield fully open . Have a large container handy and open the air bleed valve ,let water run into container for 5 minutes ,have a second person topping up pressure. See if this shifts any air trapped in the return pipework.

Thanks

I've gad the central heating on. So i will switch it off. Do i need to wait for it water to cool though?