Ideal Mini c24

[hammers4spanner]

Having a bit of a head scratcher with this one hot water is fine no issues however have a very intermittent heating issue.
Its awkward as when i arrived rads were hot boiler was working , cooled everything off and tried again boiler fired up 20 seconds shut down done this several times. Then tried to click in maybe fourth time and nothing happened boiler went through motions to fire up and nothing .

Owner said she came down this morning and boiler tried to fire but nothing . So seems to be a very intermittent issue had a thermister which i put on and still same issue so touch stumped.

 

[Rckape]

Flame rectification probe or connections to it?

 

[hammers4spanner]

No mate not those as hot water works fine

 

[Elgordo]

check that the minimum and maximum gas pressures are correct - then check that flow diaphragm is good , they can be clogged up with the black stuff or ruptured , I've also had one where pump capacitor was gone .

 

[hammers4spanner]

check that the minimum and maximum gas pressures are correct - then check that flow diaphragm is good , they can be clogged up with the black stuff or ruptured , I've also had one where pump capacitor was gone .

Is it a case of take flow diaphragm apart

 

[AlexGas]

Having a bit of a head scratcher with this one hot water is fine no issues however have a very intermittent heating issue.
Its awkward as when i arrived rads were hot boiler was working , cooled everything off and tried again boiler fired up 20 seconds shut down done this several times. Then tried to click in maybe fourth time and nothing happened boiler went through motions to fire up and nothing .

Owner said she came down this morning and boiler tried to fire but nothing . So seems to be a very intermittent issue had a thermister which i put on and still same issue so touch stumped.

Is the room stat OK!?

 

[hammers4spanner]

Is the room stat OK!?

Yes fault is getting on my nerves

 

[Rckape]

No mate not those as hot water works fine

Doh! I missed that bit.

I've not got much else to add to add now, I think I'd be looking at the diaphragm too. And obviously posting on here for help.

 

[Elgordo]

Remove switch then 4 screws holding brass cover on , wiggle it loose very gently or get a very thin blade in from the side . Use a plastic tool to slowly , very slowly , remove diaphragm remembering which way it goes and clean or replace if holed . Unscrew feed nipple on right and clean . Reassemble .

 

[hammers4spanner]

They show this fault if they pin hole?

 

[AlexGas]

Yes fault is getting on my nerves

Are you getting the right voltage from the PCB to the gas valve!?

 

[Elgordo]

If they're pinholed you get intermittent starting from the pin not driving the microswitch far enough ,it should extend about 15mm

 

[Elgordo]

Are you getting a fault sequence on the three LEDs ?

 

[hammers4spanner]

Only saw ones led

 

[AlexGas]

Only saw ones led

Ain't there 4 of them on the PCB!?

 

[Elgordo]

Take off Pcb cover to reveal the the other two , you can get the sequence codes from the manual. It's fairly basic but will point you in the right direction . If yours has two pcb's check that the ignition board has 220v when it's in fault mode , if it has then ignition board is the one at fault if other checks are ok