Central Heating Pump very noisy & no hot water?
Si & Lorro asked:
I have a Grundfos 15-50 Domestic Circulating Pump, it makes a very loud noise when calling for hot water, I have no hot water at the moment therefore the rads wont heat up. The boiler has pilot and lights up ok. The Pump make a loud whining noise for 2 mins and then stop and make a quiet rumble.
I have a Grundfos 15-50 Domestic Circulating Pump, it makes a very loud noise when calling for hot water, I have no hot water at the moment therefore the rads wont heat up. The boiler has pilot and lights up ok. The Pump make a loud whining noise for 2 mins and then stop and make a quiet rumble.
Any ideas what I can do, is it worth trying to bleed the pump?
Thanks - Do I need a whole new pump or just a part? Any ideas on costs & labour times?
Eugene
Sounds like you have a bad impeller on your pump and needs to be replaced.