Baxi boiler code E168 help pls

[Neilca]

Hi My Baxi HE33 Platinum has worked fine all summer when just hot water was required.

Now its getting colder and I have turned on the central heating I get E168 fault

The symptoms are as follows

Central heating is turned on and it works fine all the rads get up to temp and the digital readout goes up nicely, when it has reached room temp and shuts itself off and the digital read out goes down the boiler then goes in to the fault mode and nothing works.

Any help appreciated

Neil

 

[jackthom]

Apparently it could be any number of things causing this code including a faulty PCB.

There's a good bit of info here...

http://www.mainheating.co.uk/error-e168-installer-advice/

 

[St0rmer66]

Almost always PCB.

 

[Agile]

I went to one which was because the user kept turning off the power to the boiler.

The actual fault was a blocked condensate pipe!

Tony

 

[DP]

OP, talk to Baxi. Boiler possibly still under warranty

 

[Neilca]

Hi All, Just thought I'de come back with an update for future readers.

I called in a gas engineer who did lots of tests and discovered we had a faulty THERMISTER which was not reading the correct temp!
Problem solved we thought so new part fitted from the van but no luck same old problem so it must be the pcb which has been blown by the faulty Thermister.

New pcb board ordered from the internet fitted properly using the correct earth strap to stop damaging the transistors etc

PROBLEM SOLVED. all working fine now!!!

Expensive fix having already bought and fitted a new motorised head for the three way valve (Anyone need a new Motorised head) going cheap!!

Neil (Devon)

 

[Agile]

The PCB would never have been damaged by a thermistor ! Sounds like a wrong diagnosis!

But the PCBs on those models don't seem as reliable as one would expect.

I keep them in stock.

But before rushing to check them I very carefully check everything else on the boiler.

Tony

 

[Neilca]

Well all I can say is,

I'm not a gas engineer and he has been for over 40yrs and the new pcb board has fixed the problem and as the Thermister was the only fault he could find after about 1.30hrs mins of testing it looked a pretty dead cert to us and it is now working fine.
Neil