Hi,

I have an Ecodon 7.5kw which supplies heating and hot water in my 3 bed home. Of late I am needing to bleed a couple of radiators every couple of days. For example top of the landing rad had to be bled on Saturday and then again on Monday night, and it's probably 2/3 full of air.

From what I have read the most common cause of this is a leak in the system, the only works I have done of late has been upstairs and if I had a leak I would see wet patches on the ceilings of the downstairs rooms.

So I am beginning to wonder if the ASHP might be the cause. I have had it just over 6 years and to date it hasn't been serviced. Do these units need to be serviced and does anyone think this could be the cause of air in my system, as i really can't fathom what else could be the cause.

Thanks in advance.

Rob.