Ferroli Optima 701 - Air pressure switch not activating ? | Air Sourced Heat Pumps | Plumbers Forums

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bilabonic

Hi All

My old faithfull Ferroli has finally given up on me.

The pilot ignites fine, it calls for heating/HW BUT will not ignite main burner as the air pressure switch is not operating.

The pressure switch itself is fine as i have applied very slight pressure to the intake side that goes upto the fan (which is also fine/clean blades etc) and the boiler ignites.

Where do i go from here ?

What is the purpose of the switch so i have an understanding for when i call an engineer out tomorrow.

I also checked the pipes for splits/blockages and they are also fine

Cheers
 
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