If the switch remains open even after the system has cooled

this unit is specifically rated for 277V AC

most other compatible series units utilize two gaskets for a complete valve bracket overhaul

this results in "slugging

Weil McLain 510-312-279 Blower Wheel 30067439-890 If the switch remains openThe Weil McLain 510 312 279 Blower Wheel is a critical combustion component engineered specifically for VHE Series 1 through 3 gas boilers. For technicians troubleshooting draft inducer assemblies or airflow failures, this 5. 72" x 2" stainless steel blower wheel provides the necessary corrosion resistance to handle high temperature flue gases and moisture. Unlike standard galvanized wheels that often succumb to oxidation in high efficiency systems,