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Procombi exclusive 24

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J

Jacko

Gas Engineer
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58
Hello all, advice needed please..... I have an intimintent F2 L2 fault on the above boiler, gas inlet pressure above 19 mbar, good spark achieved on ignition electrode, flue and condensate all clear, flame sensing electro replaced ( by the previous engineer), gas valve vaultages 220 DC on demand, gas valve resistance on two outer pins, 4.1 kohms, I have carried out a full stripped down service and hope this has cured the fault. If I receive the dreaded recall what else could be the fault?
 
Have you checked continuity on the flame sensing lead or other leads whilst giving them a good wiggle as that may show up a fault.

Sometimes if it is a lead/cable the heat can cause signal loss issue's which you will only sort be replacing the lead.

Could eventually end up as PCB but best to have a chat with Ideal tech line, never had a problem with them,

Andy
 
Allgoode said:
Have you checked continuity on the flame sensing lead or other leads whilst giving them a good wiggle as that may show up a fault.

Sometimes if it is a lead/cable the heat can cause signal loss issue's which you will only sort be replacing the lead.

Could eventually end up as PCB but best to have a chat with Ideal tech line, never had a problem with them,

Andy
Click to expand...
All ideal tech tell you is to do a full service, and pour water down the heat exchanger.... they tell you to do that even when you have sludge in the system and overheat issues...as the flame sensing lead has been replaced they reckon it’s either the gv or pcb...... too expensive to guess.... ideal boilers rubbish when they come to fault finding it’s always either this that or the other !!!!!
 
If it’s a gamble then fixed price repair from Ideal is the best way
 
Harvest Fields said:
Isn’t L2 normally electrodes / condense / PCB?
Click to expand...
very rarely pcb fault. you need to measure flame current to see what is happening on ignition. intermitant ignition faults can be caused by trap not emptying properly if connected below sink trap with other traps on drains airlocking trap and not allowing atmospheric pressure to work syphon properly. detection leads not a problem
 
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