POTTERSON Performa 24 Eco HE fault!

[mikegas]

hi im a newly qualified gas engineer with a limited knowledge of boiler faults. This boiler fires up for 1 minute then goes to lockout. flame rectification sensors have been changed but the fault still remains. Any thoughts on what this fault could be? any advice would be much appreciated

 

[Puddle]

presume happening on hot water and heating
pump,pump flow switch
air pressure switch
check flue clear
not usually pcb,electrodes or leads

 

[wnjswozo]

pump flow switch,check aps,pump

 

[mikegas]

presume happening on hot water and heating
pump,pump flow switch
air pressure switch
check flue clear
not usually pcb,electrodes or leads

doesn't all this need to be proven before boiler even fires up?

 

[Billy Bob Bob]

blocked condensate bottle,or faulty connection screw on bottle[some were the wrong size or pcb, pull the white lead of the bottle,if its now ok theres your fault,if however its not and the boiler is still igniting and then locking out,and you have done a continuity test on the detection electrode/lead you have a faulty pcb but you must check for reversed polarity before any checks as this particular honeywell pcb is quite reliable but reversed polarity will kill it[and the replacement]

 

[mikegas]

blocked condensate bottle,or faulty connection screw on bottle[some were the wrong size or pcb, pull the white lead of the bottle,if its now ok theres your fault,if however its not and the boiler is still igniting and then locking out,and you have done a continuity test on the detection electrode/lead you have a faulty pcb but you must check for reversed polarity before any checks as this particular honeywell pcb is quite reliable but reversed polarity will kill it[and the replacement]

thanks a lot mark i will check this tomorrow, just a question on the reversed polarity, the boiler is not a new install and has been working in the past so does this rule out reversed polarity?

 

[Billy Bob Bob]

thanks a lot mark i will check this tomorrow, just a question on the reversed polarity, the boiler is not a new install and has been working in the past so does this rule out reversed polarity?

no not if householder as been messing or sparkys been in seen this happen a few times are you familiar with a multi meter and do you own a martindale/check plug if its fed by a plug thease will rule out rev polarity if its a spur multimeter on continuity should not have continuity on n-e e-l n-l

 

[fireblade]

I would of said reverse polarity been to one before fires for a second then shuts down

 

[mikegas]

no not if householder as been messing or sparkys been in seen this happen a few times are you familiar with a multi meter and do you own a martindale/check plug if its fed by a plug thease will rule out rev polarity if its a spur multimeter on continuity should not have continuity on n-e e-l n-l

yeah just recently learnt how to use a multimeter i'll do everything you've said tomorrow and see how it goes thanks again

 

[mikegas]

blocked condensate bottle,or faulty connection screw on bottle[some were the wrong size or pcb, pull the white lead of the bottle,if its now ok theres your fault,if however its not and the boiler is still igniting and then locking out,and you have done a continuity test on the detection electrode/lead you have a faulty pcb but you must check for reversed polarity before any checks as this particular honeywell pcb is quite reliable but reversed polarity will kill it[and the replacement]

Been to boiler today and checked all the above and boiler still going out after about a minute in both modes, could it be the gas valve? and does anybody know what the resistance of the gas valve should be?

 

[Billy Bob Bob]

if its locking out after a few seconds,AND STILL going to ignition,and you have checked all that has been suggested it has nothing to do with the gas valve it is the pcb

 

[mikegas]

it goes out after about a minute or 2 not just a few seconds

 

[Billy Bob Bob]

it goes out after about a minute or 2 not just a few seconds

but does it still try to ignite and the pcb not recognise that it already has?

 

[mikegas]

No the flame just goes out and the red light comes on the control panel

 

[Billy Bob Bob]

have you checked gas pressures,flue o/heat stat, thermistor, also does pump spin and flow switch stay open(lifted)?

 

[mikegas]

have you checked gas pressures,flue o/heat stat, thermistor, also does pump spin and flow switch stay open(lifted)?

checked all above today and the boiler is still not working however when i disconnected the 2 leads from the gas valve the boiler stayed fired until i re attached the wires now the boiler stays lit for around 4 minutes then goes out then re fires and continues this sequence

 

[Billy Bob Bob]

this is a strange fault for this boiler you need to have a word with baxi but i would suggest a faulty pcb or gas valve abkot uk are quite cheap for these sorry i dont have resistances or part numbers left my book in the van and its in having a pump- ecu do you have the baxi trade helpline number?

 

[mikegas]

No ive not got the number

 

[Billy Bob Bob]

08443358428 try to get Barney negative but helpful and knows his stuff,pity about my book could tell you instantly sods law!

 

[mikegas]

ok thanks for the number and thanks for your help

 

[Poxi]

Sounds to me like a flue fault..Do have a standard concentric flue or is it vertical or extended.

 

[Billy Bob Bob]

Sounds to me like a flue fault..Do have a standard concentric flue or is it vertical or extended.

not a flue fault m8
unless total blockage or pulled apart

 

[mikegas]

just a normal horizontal flue

 

[Poxi]

Try it with the combustion door off.(Testing purpose only).Will elimate flue fault if it still goes out.

 

[Billy Bob Bob]

just a normal horizontal flue

try dis-connecting ,look for a blockage this would be strange though