With the furnace off

This is often a sign of a cracked or fouled hot surface ignitor that can no longer reach the required 1

the switch utilizes a high-integrity silicone diaphragm capable of handling air and combustion by-products that are non-corrosive to silicone

you must use a model like the TRR00825 or a multi-tap transformer with appropriate primary windings

and compressors where harsh environmental conditions are present

Carrier LH39WD020 Pilot Orifice Els PW 17895 With the furnace offAs an HVAC technician, you know that precise gas flow is the difference between a clean burning system and constant service calls. The Carrier LH39WD020 Pilot Orifice is a genuine OEM replacement part designed for high performance gas furnace ignition systems. This specific pilot burner orifice is engineered with a calibrated aperture to ensure the exact metered flow of gaswhether natural gas or propanerequired to maintain a stable and reliable pilot