Vokera combi not firing after replacing covers? Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[Bobstar29]

Hi
just installed a Vokera boiler . Got it to fire up in Hw mode - but replaced covers and then it wouldn't fire up .
Now it won't fire up with covers off .
The can kicks in but nothing .

The flue is new so no blockages there.

I'll check the air pressure switch manually .

[htg engineer]

When the fan kicks in, does the boiler spark at ignition?

What's the gas pressures like?