Recent content by Thejudge

Just a brief update on this: Saturday, the problem was particularly bad, and I had to switch the system off a couple of times to get a bit of peace. Today (Sunday), it started its tricks again. I gradually turned the pump to a different setting. If you know Grundfos Alpha+ pumps, you...

Just to clarify: the Pegler Ventair is an air separator.

Quoth ACOperson: I'm pretty sure it is. When I change the control setting on it, the pitch of the motor changes. As I said, I've tried the pump at just about every setting (variable and constant), and the problem either doesn't go away at all, or goes away for a short period and then...

There was a couple of weeks ago. The problem pre-dates my last check (which I described before). Boiler was given gas safety check last week. Engineer didn't say there was a problem. Boiler is on the ground floor, in the kitchen at the back of the house. 3-port, pump and cylinder are in...

(That's weird! ACOperson, did you just edit your last post? I'm sure you asked whether I was sure it was an open system!) How much water should there be in the expansion tank? Last I looked (about 2-3 weeks ago), it was I would guess about 2-3 inches deep. I'll check again on Saturday though...

Yep, it's an Icos Ideal HE-18. From what little I know (mostly from reading this forum!), it's not a pressurised one. Expansion tank in loft, open vent pipe to it from cylinder, that sort of thing. Am I right in this?

Now I am worried! :shock: It was pretty bad on Thursday night, but no problems at all so far tonight (system on for 4+ hours). It's not a pressurised system, ACOP, so at least I don't have to fret about that as well. BTW, pardon the ignorance, but what's an AAV?

(Sorry if this contains a lot of info - better too much than too little!) I have the following CH: Icos Ideal HE-18 boiler, 7 rads (6 with Honeywell TRVs, 1 - in hall - controlled by wall stat), Grundfos Alpha+ pump, Drayton cylinder stat and 3-port actuator. System is in three-bed council...