Hello,
Had a look around the forum but could not find anything on this problem I have.
I was replacing the radiators in my house for some new ones as the old ones were only single and did not give off much heat and have drained down the system without any problems and started the work. I left the system down as was planning on doing this over a few weekends as there is no rush as its still warm. To my suprise when the hot water came on the pump seems to make a horrible noise which sounds like a problem when there is no water in it. I obviously turned it straight off away but thought I would be ok to have the central heating down but the hot water on.
Any ideas or am I just being stupid and can't have heating empty and hot water on?
I have open vent system with the little tank in the loft and a Grundfos pump (normal red one)
Cheers
Had a look around the forum but could not find anything on this problem I have.
I was replacing the radiators in my house for some new ones as the old ones were only single and did not give off much heat and have drained down the system without any problems and started the work. I left the system down as was planning on doing this over a few weekends as there is no rush as its still warm. To my suprise when the hot water came on the pump seems to make a horrible noise which sounds like a problem when there is no water in it. I obviously turned it straight off away but thought I would be ok to have the central heating down but the hot water on.
Any ideas or am I just being stupid and can't have heating empty and hot water on?
I have open vent system with the little tank in the loft and a Grundfos pump (normal red one)
Cheers