As Title, we have a vaillant, diverter valve replaced febuary, started leaking again, so we ordered a repair kit to renovate the old one we still had.
Repaired diverter valve greased and fitted. the hot water works, but heating is very weak.
used a torch to inspect the solenoid rod (vaillant calls it a motor, but it is just a solenoid really), it is fully forward most of the time, and when we turn a hot water tap on the solenoid retracts and hot water delivered, tap turned off and after a delay the solenoid returns to radiator supply.
two days ago it was working fine, and we would get nicely warm radiators around the house, now they stay lukewarm all around the house.
Any ideas if there is an easy way to prove the central heating pump is ok?
We have a magnetic filter fitted, and there has only been a little trace of magnetite on the magnets in February and just now, water still clean, just colour from the inhibitor.
I have just checked, it is a grundfos pump, those are supposed to be reliable?
Also went round and tried bleeding the radiators, no air noted in any of them ( I did not need to bleed down the whole system, just dropped the pressure to zero, changed the diverter valve, checked the magnet trap, topped up the pot with some extra inhibitor to make up for lost water, then filled to pressure again, about 1.8 bar. Only a two storey house so do not need more.
Repaired diverter valve greased and fitted. the hot water works, but heating is very weak.
used a torch to inspect the solenoid rod (vaillant calls it a motor, but it is just a solenoid really), it is fully forward most of the time, and when we turn a hot water tap on the solenoid retracts and hot water delivered, tap turned off and after a delay the solenoid returns to radiator supply.
two days ago it was working fine, and we would get nicely warm radiators around the house, now they stay lukewarm all around the house.
Any ideas if there is an easy way to prove the central heating pump is ok?
We have a magnetic filter fitted, and there has only been a little trace of magnetite on the magnets in February and just now, water still clean, just colour from the inhibitor.
I have just checked, it is a grundfos pump, those are supposed to be reliable?
Also went round and tried bleeding the radiators, no air noted in any of them ( I did not need to bleed down the whole system, just dropped the pressure to zero, changed the diverter valve, checked the magnet trap, topped up the pot with some extra inhibitor to make up for lost water, then filled to pressure again, about 1.8 bar. Only a two storey house so do not need more.
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