Grant Door Interlock Wps88 Microswitch Wp Boilers Spira

Grant Door Interlock Wps88 Microswitch Wp Boilers Spira

Grant Door Interlock Microswitch – WPS88

Part Number: WPS88
Essential Safety Component for Grant Spira Wood Pellet Boilers

The Grant WPS88 Door Interlock Microswitch is a genuine, factory-specified replacement part designed to maintain safe operation of Grant Spira biomass boilers. Fitted within the combustion or service door assembly, this microswitch acts as a vital safety interlock—automatically disabling the boiler’s operation if the door is not securely closed.

This replacement microswitch ensures continued compliance with safety regulations and keeps your heating system running efficiently and safely.

Key Features & Benefits

• Official Grant Replacement Part – Fully compatible with designated Spira boilers

• Safety Interlock Function – Prevents operation when service or combustion doors are open

• Precision Engineered – Ensures proper contact and response with door mechanism

• Reliable and Durable – Built to withstand regular use and high-temperature environments

• Easy to Install – Straightforward replacement for worn or faulty switches

Compatible with the Following Models

• Grant Spira 5-26kW

• Grant Spira 9-36kW

• Any Grant WP Series biomass boilers using the Spira door safety interlock system
  (Always check your boiler manual or consult our team for confirmation.)

When to Replace the Door Interlock Microswitch

• Boiler fails to start or stops unexpectedly despite the door being properly shut

• Microswitch is visibly damaged, worn, or fails continuity tests

• As part of periodic safety checks or routine maintenance

Technical Specifications

• Part Number: WPS88

• Function: Door-mounted safety interlock microswitch

• Type: Normally open/normally closed (check boiler wiring requirements)

• Mounting: Pre-configured for installation on Grant Spira door assemblies

• Material: Heat-resistant thermoplastic with metal actuator