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the Conbraco 18C-402X-38 Valve (also known under the Apollo brand) provides critical protection against thermal expansion and over-pressure conditions
What symptom indicates a failed damper door spring
This model features a 304 stainless steel 50 mesh screen
As a critical replacement part
Lennox 20J83 Limit Switch the Conbraco 18C-402X-38 Valve (alsoThe Lennox 20J83 Limit Switch (Model 20J8301) is an essential HVAC OEM replacement part engineered for precise thermal management in high efficiency furnaces. This single pole, single throw (SPST) automatic control is factory calibrated to actuate at 165F, effectively breaking the circuit to prevent heat exchanger damage or unsafe operating conditions. Once the plenum temperature cools to 135F, the switch automatically resets, restoring normal system
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