Ideal icos he24 system boiler

[JamesyGoosey1]

Been to a breakdown on this boiler today it's firing up for a couple of mins going off does it 3 times then goes to lockout on L f I've changed the rectifacation probe still the so stripped the burner out that all fine insulation is all good, took the conny sump off and it was bone dry cleaned it out filled it with water, tried it again still the same. Has any one had this before?

 

[SimonJohns]

Check the combustion chamber isn't clogged

Also where the white pipe comments to gas valve us clear and not full of water

Check for power to gv and good spark

 

[Ermintrude]

Is pump running? Boiler over heat lock out?

 

[JamesyGoosey1]

Yes mate pumps running fine it's a strange one I've checked everything in the mi for the l f fault code but still no joy

 

[SimonJohns]

Ve had a pump seize on me on this boiler at temp too

 

[Ermintrude]

Was flow hot and return cold? Check thirmisters, think there is a sticky about resistance values . Is there defo flow? What happens If u turn temp right down?

 

[JamesyGoosey1]

Yes there's heat leavening the boiler the rads will start to heat up when it's fireing on and off I didn't check the thermistors resistance I will do when I go back Monday tea time thanks never thought of that. The thing that puzzled me was the conny trap been bone dry never had that on any boiler before

 

[SimonJohns]

Was flow hot and return cold? Check thirmisters, think there is a sticky about resistance values . Is there defo flow? What happens If u turn temp right down?

It's not a sticky. Search icos resistance

 

[mountainman]

Is the sump to trap clear?
I've had to hammer a screwdriver into the outlet to clear it more than once.

 

[JamesyGoosey1]

Ye mate sump to trap clear as a bell had the trap off n sump cover off all clear goin into trap

 

[Ermintrude]

Take off fan and add water to hex, just check cond is getting away properly?

 

[JamesyGoosey1]

Gunna do erm, will give ideal a ring on Monday see how long it is till they blame the board ha

 

[Billy Bob Bob]

check wiring to detection probe seen one or 2 chaff going through the combustion box also they can get trapped going into the pcb via the metal drop down bracket

 

[JamesyGoosey1]

Cheers gas man forgot to mention the plastic coating had come off it but it was inside the plastic connector that goes on the probe and it had continuity threw it and it wasn't damaged other than plastic coating I was gunna change it although I wasn't convinced it was the fault till I got the price of one 50 quid+

 

[moogwai]

Had one like this.....the spark on the probes were really weak and intermittant when I took them out and watched them..i replaced the pcb and it was fine. Take out the probes and watch them through the ignition sequence and se what happens.

 

[JamesyGoosey1]

Just a quick update on this all sorted now there was water in the gas main custard forgot to mention that 3 days before I came the street had been cut off do to water in the main transco been out and got the water out all sorted thanks for all the suggestions

 

[arran197]

That's a weird one. I've had it before though on a Baxi duo tec and the symptoms were the same. But to suggest that is the issue would be clutching at straws. I found it by checking the gas pressure, which dropped off after ignition. I opened up the gas connection to the gas valve and water came out. Only reason I found it. I just cut in to the gas pipework at it's lowest point and drained a bucket full of water out.