Ideal classic

[Hollyacres]

I have an ideal classic boiler , the other morning I was woken to the sound of steam coming out of the expansion tank pipe into the expansion tank in the loft - it heated the tank enough to be very hot to the touch , I turned it off and let it cool, if I fire it up again from cold it seems to run ok - I hear the pump etc in the boiler running, after 2/3 minutes though I can hear th e boiler is overheating the water - I can hear what I imagine is bubbling, the boiler is in the laundry room, there are two pipes coming out of the top which I presume are feed and return, I will try and get a heating engineer to look at it but any ideas what may have gone wrong with it? (It’s 20 years old) but I don’t want to be faced with replacing it if there is a component defect ? And advice would be appreciated

 

[Dereekoo]

Many models of ideal classic boiler, mine doesn't have a pump in it but outside its surrounding cover?

 

[Hollyacres]

Thanks I guess it may not be a pump but it fires up ok I guess it may just be the heating process I hear

 

[Dereekoo]

Possibly heat exchanger clogged up with gunk, or feed pipe from header tank gunked up, or connection between expansion pipe and feed from header tank partially blocked or combination of all 3, hopefully plumber can sort. Has the system ever been flushed out, dosed with inhibitor or has it a Magnaclean type fitting on it

 

[ianmcd]

Has the system ever been flushed out, dosed with inhibitor

have a look in the second pic there is a little clue there

 

[ianmcd]

great boilers, very easy and cheap to repair , but sounds more like an external fault rather than a boiler fault, any so called engineer that says you need a new boiler just tell them to do one

 

[Dereekoo]

have a look in the second pic there is a little clue there

Whats Sky television to do with blockages?

 

[Dereekoo]

great boilers, very easy and cheap to repair , but sounds more like an external fault rather than a boiler fault, any so called engineer that says you need a new boiler just tell them to do one

Sounds like an external fault? thats great advice and should help him immensely.

 

[gas112]

Sounds like an external fault? thats great advice and should help him immensely.

help him more than thinking the boiler is full of gunk

 

[gas112]

be looking at pump first if its starting to over heat after 2/3 minutes

 

[Dereekoo]

help him more than thinking the boiler is full of gunk

Don't heat exchangers get blocked anymore?

 

[Dereekoo]

be looking at pump first if its starting to over heat after 2/3 minutes

Notwithstanding that he states the pump seems to be running OK would not the boiler trip out in overheat ( little red button RHS) if there was no flow through it?

 

[gas112]

Notwithstanding that he states the pump seems to be running OK would not the boiler trip out in overheat ( little red button RHS) if there was no flow through it?

eh not all classics have the little red button overheat stat that was only on some models

 

[ianmcd]

Don't heat exchangers get blocked anymore?

I have worked on hundreds of Ideal classics and never seen a blocked heat exchanger on one ever, a blocked heat exchanger does not happen overnight , it would be kettling and getting worse over many months

 

[Dereekoo]

So the answer is no, thats better advising the OP that it can't be the heat exchanger, so we are back to the pump and/or ? ? ?