Armstrong Furnace R33191A001 Relay

The Armstrong Furnace R33191A001 Relay is a mission-critical Time Delay Relay (TDR) designed for HVAC blower motor control and sequence timing. This SPST (Single Pole Single Throw) component is engineered to manage the delayed start and stop functions of Armstrong furnace blowers, ensuring optimal heat exchanger cooling and improved system efficiency. Operating primarily on a 24V control circuit, this relay prevents rapid cycling and reduces mechanical stress on the blower motor by maintaining precise timing intervals. Whether you are performing a furnace relay replacement or troubleshooting intermittent blower issues, the R33191A001 offers a direct-fit solution for Allied Air and Armstrong Air equipment. Its robust construction ensures reliable switching for inductive loads, making it a standard inventory item for technicians servicing residential heating systems. Utilizing a high-quality Armstrong R33191A001 heater relay restores the original equipment manufacturer (OEM) sequence of operation for peak performance.

Key Benefits for Technicians:

• OEM Compatibility: Exact replacement for Allied Air and Armstrong heating units, ensuring correct terminal alignment and mounting.
• Enhanced Motor Life: Precisely manages blower motor delay to prevent short-cycling and premature motor failure.
• Reliable Switching: SPST switching contacts are rated for high-cycle industrial standards to handle furnace control voltage demands.
• System Efficiency: Optimizes heat dissipation from the heat exchanger after the burner cycle completes.

Common Questions:

How do I troubleshoot a faulty Armstrong furnace relay?
Verify 24V at the coil terminals; if voltage is present but the SPST contacts do not close or the timing interval is non-existent, the relay requires replacement.

Does this relay control the blower delay on both heat and cool cycles?
The R33191A001 is specifically tuned for the sequence of operation designated by the control board, primarily managing the post-purge blower timing.

Can I use this as a universal time delay relay?
While it functions as a time delay relay, it is best practice to use this specific Armstrong OEM part to ensure the internal timing logic matches the furnace’s CFM and heat rise requirements.

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.