Baxi 100he combi

[Baxmax]

Heres one to chew on,boiler fires up and makes a growning and vibrating dying person sound.Gas supply is o.k flue is o.k fan speed is o.kAny ideas ???

 

[Vic Spanner]

1. co is out
2. burner damaged
3. Fan venturi pipe not fitted correctly
4. Give up. (hurry up footballs on in a minute)

 

[kevplumb]

pump

 

[Baxmax]

I hate football.I will fit a new g.v tomorrow and let you know the result...

 

[Baxmax]

Pump ???

 

[kevplumb]

as in slow curculation

 

[Baxmax]

Not pump, air supply,gas / air mix poss, as burner lights noise occurs burner dyes..Thanks for ideas anymore ???

 

[gazthepottertonengineer]

i go with either burner which you will be able to see if it has hole in it or more than likely will be gas valve
you cant adjust gas valve as digital manometer isnt accurate enough to go down low enough so you will have to change it

 

[Baxmax]

Thanks Gazpot i did chage the burner as is was one of the not so good "white plaque" ones.I think the confirmation of the g.v sounds about right.One other strage thing with this one is that it shows fan fault indication but it still fires !

 

[ChrisR]

digital manometer isnt accurate enough to go down low enough

0.01 mbar not low enough??

 

[Baxmax]

On closer inspection fan had failed the fact the burner was still lighting threw me.You would think if the fan did not spin the gas would not pass to the burner as a sort of safety thing.Fan failed due to loose connection on pcb.Thanks for input.

Such is life

 

[Gasguru]

Perhaps the gas valve is faulty - the zero governor shouldn't pass gas unless the fan runs.

 

[Baxmax]

I agree but the g.v is new.

much is strife

 

[croydoncorgi]

Mano reading not LOW enough = not enough resolution. Premix setups need 0.1 mB resolution at close-to-zero pressure.

 

[ChrisR]

Yes I know. If you'd read wot I rote.... mine reads to 0.01mbar , ( up to 19.99mbar, then 0.1mbar up from there.) Get yourself a decent one!