Halstead Ace Pressure Problems

[Everton]

Hi all, long time prowler of these forums looking for something that would help me with my Halstead Ace. I'll try and summarise whats happens with my hot water, any guidance gratefully received:
1. Bath tap on, hot water coming out, boiler pressure at 1.5bar
2. Boiler ignites and you can hear it heating up, pressure start fluctuating between 1.3 and 1.6.
3. Pressure rises to 2 bar, gurgling noise, hissing and steam from top left of boiler.
4. Pressure falls to 1.2ish hissing stop and pressure back to 1.5.
5. Ignites again and overtemperature lock out comes on.

Suggestions?

Not sure if this helps but the tap whistles slightly when on, this definitely increases in line with the boiler warming up
Also I only seem to have 3 lukewarm radiators upstairs and 3 cold ones downstairs. Bled them, tried the air forcing round technique, no joy. So any guidance here welcome.

Thanks in advance
Cold, poor and miserable

 

[tonybhoy]

Sounds like the pump has failed mate or is about too. Boiler is overheating and the AAV is getting rid of the excess heat in the boiler.

The pump being faulty would explain the poor circulation of the rads too

 

[kevplumb]

expansion vessel need some tlc

 

[Everton]

Bit more info....

Checked the pump (big silver screw out, had look in, all spinning fine)

Espansion vessel TLC..... can you explain a bit more, thats the big orange thing at the back which has like a bike valve sticking out of it?

 

[tonybhoy]

Espansion vessel TLC..... can you explain a bit more, thats the big orange thing at the back which has like a bike valve sticking out of it?

Needs recharging mate, there is a faq above but basically you need to open the heating drain (and keep it open) and drop the pressure on the system then, using a bicycle pump or similar, re-charge the EV to about one BAR then refill the system.

 

[Everton]

Sounds like a good (and cheap!!) plan, I'll give it a go, once I obtain a pump, and report back.

Hooray, feels like I've moved forward more in the last 10 minutes than the previous 2 months!!! Should of posted ages ago.....

 

[Everton]

Drained and pumped up the EV, still doing the strange pressure game. Although radiators seem to have got better, upstairs toasty, downstairs luke warm, so progress made