Johnson Controls T-4002-5009 Calibration Tool but surface degradation of the

but surface degradation of the rod usually necessitates a permanent OEM flame sensor replacement to ensure long-term signal stability

Universal Compatibility: Efficiently steps down 208V/240V primary voltage to the 24V secondary required for modern HVAC control circuits

This T-fitting restrictor is constructed from high-grade thermoplastic

requiring a technician to physically inspect the system and clear the fault before the unit can resume operation

As a genuine HVAC replacement part

Johnson Controls T-4002-5009 Calibration Tool but surface degradation of theJohnson Controls T 4002 5009 Calibration Tool, Usaed with Pneumatic Thermostats