Brian Herbert

I really should look at that - to be honest I am having to prioritise things a bit at the moment as I've got too many projects on the go. But duly noted - good idea.

I have now found a replacement fan and motor ( they will not split) for this heat pump for £410 inc Vat - so I am going to buy this and fit it. Expensive but cheaper than a new HP! It superseded the original but is guaranteed to work with the HP - so here's hoping. A fan blade would have been cheaper!! Thanks again - I have learnt a lot.

Thanks for all your help and advice - much appreciated.

No - I don't think I can given it's construction. I now see ( belatedly) that the RPM of the original fan was 675RPM whereas the new one is 1360 rpm which I would have thought would have increased the airflow - but clearly not. The Spanish company that supplied the original has long since gone bust and no spares are available sadly. I think I may have to accept the end has arrived and I will have to bit the bullet - it will have to wait till next year though.

Thank you for your advice. My new fan is 450mm Dia the old one was 480mm so I didn't think that would be such a problem. The engineer didn't mention anything to me either when I told him my plan. Sounds like there is nothing I can do as I can't find anyone who can supply a 480mm diameter fan sadly.

Hello - I have a self build / designed home, and we have a free standing Heat Pump ( air to water) with a vertical Fan on top. I recently replaced the fan & fan motor as one of the blades had broken. ( This site helped me clarify the fan type I required). I had an electrician wire it in with the new capacitor. It heats a small swimming pool. It worked fine for a few days, then suddenly decided to Ice up badly at the weekend. The frost stat kicked in and cut it off. It was a warm day so I would not have expected that to happen. After it had thawed out, I checked everything still worked ok - and it does. It has never iced up before, and I am wondering if the new fan is too powerful and has caused the problem? I did in fact get a slightly smaller fan blade diameter than the original, as there were none at the diameter I required, so I would be surprised if it is? It draws air in through the sides, over the refrigerant coils, and then eventually blows the cold air vertically out of the top after the heat extraction . It is housed with ample free air space around it, but it is clearly condensation badly for some reason. Last year I had new refrigerant put in when a small leak was repaired. I am wondering if possibly that leak has returned, however the operating pressure meter seems to read ok? It seems too coincidental that this has occurred only a few days after changing the fan. The fan sucks and blows in the same direction as the old one. The HP is now 10 years old and we are fed up spending money repairing it when perhaps we should have a new one installed. The company that repaired it last year has now dissolved and so before I engage another professional engineer, I just wondered if anyone had any thoughts, suggestions or advice in case I am missing something obvious. If I get a professional engineer , should they be able to test that the compressor & condenser are working correctly? Any ideas welcomed. Thanks.

Thanks very much - great help.

Hello - I am renovating a house and facilities for myself and family. I am not a heating engineer. There is a 25kW air to water vertical standing heat pump ( no brandname). It heats a 14k gallon swimming pool. The fan on the top has broken. It appeared to be blowing air out vertically when it was operating. I don't know if the replacement fan should be a suck or blow fan? I believe that air will move up inside the heat pump travel over the motor, then to the fan and then out of the top of the unit, so I believe the fan will be a blow orientation. Before I make an expensive mistake, I wondered if anyone could advise me?? Hopefully if I get it wring there will be no damage. Many thanks Brian