Frequent "Check Air Cleaner" messages on the communicating thermostat

Common signs of a faulty board include the furnace blower running constantly

Why is my boiler failing to sense flame after installing a new assembly

it ensures positive dead-end lock-up

Maxon 200SMA11AA11BB22A0 Gas Valve 321894-709 Frequent "Check Air Cleaner" messagesThe Maxon 200SMA11AA11BB22A0 Gas Valve is a 2 inch, heavy duty electromechanical safety shut off valve (SSOV) engineered for high demand industrial combustion systems. This normally closed, automatic reset valve is built with a rugged cast iron body and features ANSI threaded (NPT) connections for secure integration into high capacity fuel trains. Utilizing Internal Trim Package 1 and Buna N O rings, the unit provides reliable standard port flow