or a loss of system pressure that cannot be attributed to the expansion tank or air vents

and retaining nut required to stop leaks at the vent or under the canopy

Thermal Stability: High-purity silicon carbide design ensures consistent resistance readings and reliable ignition in both Natural and LP gas environments

Confirm if the Armstrong R37520B002 has tripped by checking for continuity

As an authentic OEM Armstrong replacement part

Reznor 97300 Gasket or a loss of systemWhen you're servicing a unit and find the seal on the venter motor or collector box has degraded, the Reznor 97300 Gasket is the specific OEM component required to restore peak pneumatic integrity. This venter gasket is engineered for a precision fit on Reznor FE series heating units, specifically models FE130 through FE400. Constructed from high density, heat resistant elastomeric material, it creates a robust barrier against flue gas leakage while