Hi, was wondering if someone could give me some advice on what is causing my upstairs radiators to be hot but the ones downstairs to be cold (or at best, tepid)?
I have tested the pump and it seems to be working fine. When I switch on the CH I can hear it whirring, there is a vibration from the pump when you touch it and there is a distinct (low) sound of water being forced through it. It also gets pretty hot after a while, so I presume hot water is passing through it.
The other evening I switched all the radiators off upstairs and found the ones downstairs started to get hot! But as soon as I switch on the upstairs rads I get the same problem.
After a lot of testing TRVs and lock shields and bleeding radiators I'm left scratching my head.
Does the system need a powerflush? Is there a "radiator balancing" problem? Something worse?
Boiler: Ideal Mexico HE24 floorstanding, located downstairs with its timer/controller. Thermostat is in the hallway. Pump is in the upstairs bathroom - Grunfos Alpha+ with a Honeywell Sundial Y plan 3 position diverter valve. 7 rads upstairs, 4 rads downstairs.
Help!
I have tested the pump and it seems to be working fine. When I switch on the CH I can hear it whirring, there is a vibration from the pump when you touch it and there is a distinct (low) sound of water being forced through it. It also gets pretty hot after a while, so I presume hot water is passing through it.
The other evening I switched all the radiators off upstairs and found the ones downstairs started to get hot! But as soon as I switch on the upstairs rads I get the same problem.
After a lot of testing TRVs and lock shields and bleeding radiators I'm left scratching my head.
Does the system need a powerflush? Is there a "radiator balancing" problem? Something worse?
Boiler: Ideal Mexico HE24 floorstanding, located downstairs with its timer/controller. Thermostat is in the hallway. Pump is in the upstairs bathroom - Grunfos Alpha+ with a Honeywell Sundial Y plan 3 position diverter valve. 7 rads upstairs, 4 rads downstairs.
Help!