will eventually cause the refractory material to degrade or spall

The integrated dirt-protection filter prevents orifice clogging

breaking the electrical circuit to the gas valve if the high-limit threshold is exceeded

Common Questions: What causes the relief valve to drip on a Watts 009 unit

For contractors performing preventative maintenance or replacing a failed vent motor

Lennox 88K09 Sequencer will eventually cause the refractoryMaintain precise control over your electric heating stages with the Lennox 88K09 Sequencer. Specifically engineered for electric furnaces and air handlers, this triple stacked thermal time delay relay manages the staggered activation of heating elements and blower motors. By sequencing these high amperage loads, the 88K09 prevents hazardous circuit overloads and eliminates sudden voltage drops at startup, ensuring the long term reliability of the