Armstrong Furnace R42936-001 Discharge Thermostat

The Armstrong Furnace R42936-001 Discharge Thermostat is a critical high-limit safety component engineered specifically for HVAC discharge temperature monitoring. Designed to integrate seamlessly with Armstrong and AirEase furnace models, this limit switch monitors heat exchanger temperatures to prevent thermal runaway. When discharge temperatures exceed factory-set parameters, the R42936-001 interrupts the heating circuit, protecting the heat exchanger and ensuring system safety. This OEM replacement part features a precision bimetallic thermal disc for accurate sensing and rapid response times. For service technicians, utilizing genuine Armstrong furnace parts ensures electrical compatibility and maintains the equipment's original safety listing. This discharge air temperature sensor is built to withstand high-duty cycles in residential forced-air applications. Verify the specific temperature rating and reset type (automatic or manual) against the unit’s wiring diagram to ensure correct furnace high limit switch application and system reliability during peak demand.

Key Benefits:

• Precise Thermal Protection: Engineered to trip at specific temperature thresholds to prevent heat exchanger damage.
• OEM Compatibility: Exact electrical and physical fit for Armstrong Air R42936-001, reducing installation time.
• Reliable Switching: High-quality internal contacts designed for long-term cycling in high-heat environments.
• Safety Compliance: Restores the original safety parameters of the furnace for secure residential operation.

Common Questions:

What causes a discharge thermostat to trip?
A tripped R42936-001 is usually the result of restricted airflow, often caused by a dirty filter, blocked registers, or a failing blower motor.

Is the R42936-001 an automatic or manual reset switch?
Specific functionality depends on the furnace series, but this furnace safety limit typically operates as a critical safety break in the 24V control circuit.

Can I bypass this thermostat for testing?
Bypassing safety controls is never recommended. If the discharge temperature sensor is open, technicians must diagnose the airflow or combustion issue before replacement.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.