Firstco E190 Motor Door Safety Switch

The Firstco E190 is a motor door safety switch designed for use with Firstco HVAC air handler units. This essential safety component ensures that the blower motor will not operate when the access door is removed or improperly secured, protecting both technicians and occupants from potential safety hazards.

Key Features:

• Factory replacement blower door interlock switch for Firstco air handlers
• Compatible with UCQB, UCQBR, UCXQB, and UCXQBR series units
• Prevents blower motor operation when access door is open
• Critical safety device that interrupts power to the blower when door is removed
• Essential for preventing circulation of combustion products in installations where water heaters share the same closet
• Standard electrical connection with lead wire design

This cut-off switch is a mandatory safety feature on Firstco air handlers and must be properly functioning for safe unit operation. The switch activates when the blower door is properly closed and secured, completing the electrical circuit to allow normal blower motor function. When servicing HVAC equipment, this component ensures technician safety by de-energizing the blower during maintenance procedures.