Trane RLY2807 Time Delay Relay

The Trane RLY2807 Time Delay Relay is a critical OEM replacement part designed for post-purge blower control in American Standard and Trane air handlers. Also identified as RLY02807 and 57T01-001, this component ensures the indoor fan continues running for a fixed 80-second off-delay after the compressor cycles off. This sequencing relay is engineered to maximize SEER efficiency by circulating residual conditioned air into the living space, preventing energy waste common in older systems. Built with a 24VAC coil and featuring normally open (NO) contacts, it supports a 2-second on-delay to protect against compressor short cycling. This HVAC control board and relay assembly is a direct replacement for legacy part numbers such as RLY02257 and C800924P01. For field installation, the relay utilizes standard 1/4-inch quick-connect terminals, maintaining pin-for-pin compatibility with existing wiring diagrams in split system heat pumps and electric furnaces. This inductive load relay is rated for 7 FLA and 36 LRA at 240VAC, ensuring durability under high-torque blower motor startups.

• Direct OEM Fit: Drop-in interchangeability with Trane part numbers RLY01685, RLY01169, and White-Rodgers 57T01-843.
• System Protection: Integrated anti-short cycle timing prevents rapid compressor restarts, reducing mechanical stress.
• Enhanced Efficiency: Fixed 80-second delivery of residual heating or cooling capacity boosts overall system performance.
• Contractor Grade: Robust power pole contacts rated for residential and light commercial PSC blower motors.

What are the signs of a faulty RLY2807 relay?
If the indoor blower motor fails to shut off after the thermostat demand is met, or if the fan fails to start despite a 24V signal at the G terminal, the internal timing circuit or relay contacts may be fused or open.

Is the RLY2807 compatible with older air handlers?
Yes, this is an electrically identical upgrade for the older RLY02257. While the physical appearance or terminal layout may differ slightly, the terminal designations (1-COM, 3-NO, etc.) remain consistent for wire-for-wire replacement.

Can I use this for non-Trane equipment?
This relay is specifically programmed with Trane and American Standard logic. While it functions on a standard 24V control circuit, it is best utilized within its intended OEM HVAC applications to maintain factory sequence specifications.

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.