Potterton promax SL making a humming sound.

[flesi]

Hi guys, having a problem with a potterton promax SL making a humming /vibrating noises. Gas ratio & inlet pressure it's fine. Has anyone come across this issue before. Cheers in advance.

 

[zeebeedee]

Venturi blocked?

 

[Billy Bob Bob]

either swarf in the fan plastic venturi or a heat exchanger casting fault or sludge in the main heat exchanger or faulty burner
take your pick

 

[flesi]

Cheers gasman, I do suspect the fan, the boiler is only 2year old and the quality of water is fine.

 

[BLOD]

If the noise happens on start up check the flue turret to boiler gasket - it could be perished

 

[flesi]

The noise happens after the boiler runs for a little while and it doesn't do all the time.

 

[Billy Bob Bob]

Cheers gasman, I do suspect the fan, the boiler is only 2year old and the quality of water is fine.

TBH even though i fit baxi/potterton combis i wont touch the heat only solo/promax/gold etc fitted one never again

 

[flesi]

For future reference I've changed the fan and all seems to be fine!

 

[GQuigley67]

I've had this problem on start up on fitting 2 previous vokera mynutes VHE's, you think its mostly down to sludge in Heat Exchanger? it does sound like the fan mind you, I know they are crap boilers but we don't get paid to powerflush or anything before fitting them.

 

[tamz]

Gerry have you not got a conscience :lol: £££ :wink:

 

[GQuigley67]

money talks tamz

 

[ambrosia]

I've had this problem on start up on fitting 2 previous vokera mynutes VHE's, you think its mostly down to sludge in Heat Exchanger? it does sound like the fan mind you, I know they are crap boilers but we don't get paid to powerflush or anything before fitting them.

the only time i'd recommend a vokera is if youre not doing a powerflush, the tubes in the heat exchanger are 3 times thicker than a vaillant
or so the rep said, and to be fair to him you have to have big kahunas to stand around a busy merchants trying to promote vokera