Also referred to as a pressure differential switch, it is designed to act as a safety instrument which checks if the fan is running correctly, the air pressure switch connects to the Fan via heat resistant tubes which go directly onto the fan Venturies. Through these, it enables the boiler to detect when the fan is running to ensure that if the fan fails there would not be a build-up of toxic fumes with no way of venting them, A signal would then be sent to the printed circuit board telling the boiler to stop sending gas to the burner and preventing the boiler from turning on.

Potterton Pressure Switch 720011401

Part: 720011401

Price: £56.16
Saunier Duval S227097 Air Pressure Switch

Part: S227097

Price: £41.54
Ideal 172588 Mini Air Pressure Switch

Part: 172588

Price: £49.50
Main Air Pressure Switch 5112196

Part: 5112196

Price: £24.84
Saunier Duval S230000 Air Pressure Switch

Part: S230000

Price: £45.95
Main Air Pressure Switch 248466

Part: 248466

Price: £14.30
Potterton Pressure Switch Kit 5111610

Part: 5111610

Price: £27.68
Main Pressure Switch Pro 64220802

Part: 64220802

Price: £70.82
Chaffoteaux - Air Pressure Switch - 65100716

Part: 65100716

Price: £46.93
Ideal 172589 Mini Air Pressure Switch

Part: 172589

Price: £83.24
Ariston 60081054 Air Pressure Switch

Part: 60081054

Price: £161.60
Potterton 642216 Air Pressure Switch

Part: 642216

Price: £72.68
Main Switch 226060

Part: 226060

Price: £36.75
Main Air Pressure Switch 5105575

Part: 5105575

Price: £63.36
Baxi Pressure Switch 5111414

Part: 5111414

Price: £139.21
Saunier Duval S227129 Air Pressure Switch

Part: S227129

Price: £27.40
Biasi BI1036103 Prisma 28Se Air Pressure Switch

Part: BI1036103

Price: £49.69
Main Pressure Switch 230068

Part: 230068

Price: £41.95
Ferroli 39800140 Optima Air Pressure Switch

Part: 39800140

Price: £32.00
Ideal 111379 Classic Air Pressure Switch

Part: 111379

Price: £53.76
Baxi 230068 Solo 2 Air Pressure Switch

Part: 230068

Price: £41.95
Main Air Pressure Switch 642481

Part: 642481

Price: £78.66
Saunier Duval S202005 Air Pressure Switch

Part: S202005

Price: £50.67
Chaffoteaux 61313932 Air Pressure Switch

Part: 61313932

Price: £53.81
Biasi BI1016106 24S Air Pressure Switch

Part: BI1016106

Price: £49.69
Ideal 171454 Classic Air Pressure Switch

Part: 171454

Price: £68.25
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