Lennox 58C98 Relay

The Lennox 58C98 Relay is an essential OEM replacement component engineered for precision timing and sequenced power distribution in residential and commercial forced-air systems. This Time Delay Relay is a stacked DPST (Double Pole Single Throw) configuration designed to handle inductive loads in Lennox furnaces and heat pumps, specifically replacing legacy part numbers 69C98, 69C9801, and 58C9801. By utilizing 24V terminal logic, this solid-state component prevents premature blower activation, ensuring heat exchanger temperatures reach optimal setpoints before air distribution begins, which prevents cold drafts and reduces thermal stress on the system.

For technicians servicing Lennox E12Q series units or high-efficiency furnace models, the 58C98 provides a direct-fit solution with a standard foot mount. This furnace relay manages the critical timing between the thermostat call and the blower motor engagement, effectively fixing issues where the condenser fan motor fails to run or the furnace begins a cycle without heating. With N.O. (Normally Open) contacts and a design intended for 120/277VAC power circuits, this relay provides the reliable switching necessary for consistent indoor climate control and peak operational efficiency.

Key Benefits for HVAC Technicians:

• Universal Compatibility: Direct OEM replacement for Lennox 58C9801, 69C98, and 69C9801 models.
• Optimized Sequencing: Prevents cold air delivery by delaying blower activation until the heat exchanger is at temperature.
• Robust Switching: Features a DPST N.O. configuration rated for 24-volt control circuits and high-voltage motor loads.
• Enhanced System Longevity: Reduces rapid cycling and thermal shock on furnace internal components.
• Solid-State Reliability: Engineered for industrial-grade durability compared to generic mechanical timing alternatives.

Common Technical Questions:

Is the 58C98 compatible with older Lennox G-series furnaces?
Yes, the 58C98 is a backward-compatible replacement for several older sequence relay models. Check the cross-reference list for 69C98 to confirm fitment for your specific model number.

Can this relay solve a "blower stays on" or "blower won't start" issue?
Typically, yes. If the furnace is heating but the blower fails to engage—or stays on indefinitely after the call for heat ends—the time delay logic within this relay is likely compromised and requires replacement.

What is the voltage rating for the control side?
This is a 24V AC relay designed to interface directly with standard HVAC control boards and thermostats.

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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.