Airflow through the venting system has to stay within a safe range or the stove needs to shut down, and that job falls to the vacuum switch. The Enviro 50-1390 is the genuine replacement switch for this function, sold as an official Enviro part rather than an aftermarket equivalent. The Enviro 50-1390 vacuum switch replaces the low-pressure safety switch in compatible Enviro pellet stoves and inserts.

Purpose

The switch senses the negative pressure created by the exhaust fan to confirm proper ventilation. If airflow drops due to a blockage or leak, it opens the circuit, cutting the fuel feed and shutting the stove down before an unsafe condition develops.

Key Benefits

• Genuine Enviro construction built to the original switch's pressure tolerances
• Maintains long-term reliability of the stove's safety shutdown system
• Direct-fit replacement — no modification needed
• Ships new in original Enviro packaging

Other Notes

If the stove is tripping this switch repeatedly, check the venting for blockages or leaks before replacing the switch itself, since restricted airflow is a common cause of nuisance shutdowns.

This part fits 7 compatible models on record. While servicing the vacuum switch, it's worth inspecting the exhaust fan, gaskets, and venting for wear, since all three affect the pressure readings this switch relies on.

Not sure it fits your unit? Contact us with your model number and we'll confirm before you order.