Discuss Ideal mini he 28 combi On and off in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Nope, just me not looking at the forum properly.:p:p. Got to be a partial blockage somewhere if it was the rectification you would expect it to do it on water as well. Is the heat ex noisy with the heating on?

Can't be main hex as hot waters fine

Pop the bleed screw out when it's running and get an old flat headed screwdriver and pop it in the hole and apply medium ish pressure if it stops the pump isn't strong enough to push the system water around
 
Nope, just me not looking at the forum properly.:p:p. Got to be a partial blockage somewhere if it was the rectification you would expect it to do it on water as well. Is the heat ex noisy with the heating on?
A bit of a rattle with the water on
 
I didn’t , I stuck a screwdriver on the body and listened to the pump with the other end poked against my ear, this may of course not be in the “ how to fix boilers school of thought ”
Could be the pump then mate. I would go back and do what me and Shaun have said and test the pump. Definitely sounds like a circulation issue.
 
Or if you have a difference temp meter measure the flow and return straight out the hex
 
If it's hitting 90 there's your reason why it's shutting down

So then it's either pump or hex like you said
You’ve made me question myself now:p:p:p. The HE is the one with the plate and primary heat ex isn’t it? Not just a primary? Got brain freeze?
 
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