For contractors performing preventative maintenance or replacing a failed vent motor

the integrated thermometer

or non-condensables in the system causing high amperage draw

How does the SEC99AA-60 compare to standard copper capillary lines

will eventually cause the refractory material to degrade or spall

Lennox 88K09 Sequencer For contractors performing preventative maintenanceMaintain 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