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Ariston combi boiler keeps showing fault code 5p3

Fault more predominamt when boiler is cold

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  • Dave Sep 10, 2013

    Fault most likely pcb.check flame detection probe condition first.

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  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: I have an Ariston Microgenus 27 Combi Boiler

I hate these boilers!

If the pump is not circulating change it. If the pump is ok you may have a blockage in the diverter valve

Posted on Jul 05, 2008

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  • 7 Answers

SOURCE: Ariston Microgenus 27mffi combi boiler

im an engineer and recently had exactly the same thing with this ariston boiler, i found out it was the the 'air pressure switch', this is a switch which is part of the ignition, it works in conjuction with the fan. when the boiler fires up the air pressure switch makes, if its faulty it can break the circuit mid flow and cause the burner to shut down therefore giving intermittent hot water and heating, theres a possibility that the aps tubes may be damaged as well so ensure they'e condition is good. hope this helps you

Posted on Sep 18, 2008

  • 18 Answers

SOURCE: COMBI BOILER PRESSURE PROBLEM

It sounds like the expansion tank is unable to cope with the expansion of the water in the system. It may have failed or there may be a blockage so water is unable to get to it.

Posted on Jan 04, 2009

  • 1 Answer

SOURCE: no hot water from combi boiler

i have a combie bolier when i turn the hot water taps on only cold water comes out central heating working fine can any one give some advise ?and can i fix it myself.

Posted on Mar 20, 2009

  • 13 Answers

SOURCE: my ariston micro genus type c boiler keeps going

when was it last serviced?dirt may be a factor,there are many parts that cause this fault in the microgenus so you need someone familer with the product parts playing up could be1.airswitch2motor3flowgroup4ntc you havent mentioned if it needs re-setting

Posted on Jan 17, 2010

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1 Answer

I have a 5p3 error code on a class 24he combi.5 year old.checked dtp volts ok.flue is clear.gas pressure fine.lights 3 times then locks out.any common fault with this boiler please?


Google your product brand and model number, and add .pdf to search parameter to locate possible manual which will have brief troubleshoot section, but will not show a service manual.

Resource:
http://www.thetankatwaterheaterrescue.com/forums/forum3/
Gene
h

Aug 25, 2013 | Water Heaters

1 Answer

Ariston microgenus he24 fault is e34 but boiler works when front cover is removed


e34 on a ariston is the fan. Boiler fires up with cover off as its getting the air it needs from atmosphere! fan is not running at full speed

Nov 04, 2011 | Combi Centre DX - Mango

1 Answer

My ariston micro genus type c boiler keeps going hot and cold, the heating also switches on and off, any ideas


when was it last serviced?dirt may be a factor,there are many parts that cause this fault in the microgenus so you need someone familer with the product parts playing up could be1.airswitch2motor3flowgroup4ntc you havent mentioned if it needs re-setting

Jan 10, 2010 | Combi Centre DX - Mango

3 Answers

Ariston A01 fault combi boiler


its not definately the pcb. change the detection sensor first( £3.20p). if this doesnt fix a01 fault then change the main pcb(£145).

Oct 29, 2008 | Water Heaters

1 Answer

Ariston Microgenus 27mffi combi boiler


im an engineer and recently had exactly the same thing with this ariston boiler, i found out it was the the 'air pressure switch', this is a switch which is part of the ignition, it works in conjuction with the fan. when the boiler fires up the air pressure switch makes, if its faulty it can break the circuit mid flow and cause the burner to shut down therefore giving intermittent hot water and heating, theres a possibility that the aps tubes may be damaged as well so ensure they'e condition is good. hope this helps you

Aug 29, 2008 | Combi Centre DX - Mango

2 Answers

Ariston combi boiler


sounds like your diverter valve is passing on the boiler, this diverts the heat either to the rads or to the taps, if its passing through the heating chanel it'll heat up the rads- may also be a scaled up secondary heat exchanger, hope this helps you

Aug 21, 2008 | Combi Centre DX - Mango

1 Answer

No hot water help


have a ariston euro combi boiler ,the problem to get hot water i have to turn the heating on to get hot water. but now it only run for a few min then run cold please help

Feb 18, 2008 | Washing Machines

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