I have underfloor heating throughout my house and it seems to be working great. It's been in the house from new, 19 years ago and hasn't caused us any issues in that time.
Our plumber replaced a faulty circulation pump a few months ago and said that when he got it back to his workshop he found that it was filled with a dirty substance. He suggested that we get the underfloor heating flushed.
Soon after I switched on our boiler after being off for the Summer and we found that it was sounding noisy and whilst it heated fine it didn't sound as quiet and smooth as before the Summer. I mentioned this to our plumber and he said he'd quote for a new boiler (it's 7 years old - he fitted the last one). Since then it has been quiet and back to normal!
The plumber said that it could be the dirt he found in the pump making its way around the system that caused the noisy boiler and that it has just moved on. It's worth noting that he's not an underfloor heating specialist.
My question is do I need to flush the underfloor heating at the moment if it's working fine or should this be done periodically anyway?
I'm uncertain so thought I'd turn to you guys here for your advice.