Valiant boiler ' whistling'

[GBZ]

Just had a call from someone with regard to a whistling noise coming from their Valiant.

It seems to stop when HW turned on, then begins again when off. No problems with heating, no rads been recently bled.

Any ideas?

Keith

 

[oldplumber]

need to go and look, burner pressure etc to find out whats wrong.

 

[tipintim]

Auto air vent?

 

[garethp]

nah, bet it's the diverter valve

 

[wnjswozo]

do a fga test,check ratio,s

 

[stevetheplumber]

which tune ?

 

[fixter1]

birdy song lol

 

[aggis]

If Eco max/tec ranges replaces burner/combustion chamber seals the fga & pressure/ gas rate

 

[H20:)]

Vailliant turbomax's had a washer in the bypass pipe that used to whistle a tune.