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In the cited Lennox control manual, E118 means “Reset limit exceeded (Hard-Lockout).” It is recorded after the unit enters and is manually taken out of soft lockout six times within 15 minutes. The manual’s stated clearing step is a power cycle; if the alert returns or normal operation does not resume, have the system checked by a Lennox dealer or HVAC professional.
What Lennox E118 means
The Lennox diagnostic manual defines E118 as “Reset limit exceeded (Hard-Lockout).” It says the unit entered and was manually exited from soft lockout six times within a 15-minute interval. That threshold describes how this fault is triggered; it does not identify the original condition that caused the earlier soft lockouts.
See the Lennox control diagnostic codes manual for the E118 entry. The equipment model and control revision matter: this code guidance comes from a particular Lennox control manual and should not be assumed to apply identically to every Lennox furnace.
How to respond to E118
1. Confirm the code applies to your equipment
Check the furnace or system model label and its owner or control manual. Lennox’s product help and contact page provides a way to search product literature by category or model number. If you contact a dealer, share the model and the exact alert code.
#1 Best Overall
- Genuine Replacement Component: 94W83 is a genuine replacement component designed for single-stage furnaces. This control board manages critical furnace operations, including ignition sequencing, flame sensing, and blower control, ensuring safe and efficient system performance. It operates within a voltage range of 18-30 VAC
- Wide Compatibility: 94W83 replaces older part numbers such as 81W11, 103085-01, 103085-02, and 103085-03. Ensure compatibility with your furnace model before replacement and follow all safety protocols during installation. This control board is essential for maintaining the reliable operation of your heating system
- High-Quality Manufacturing: Advanced microprocessor-based high-precision PCB manufacturing, soldering and assembly technology, professional tests to ensure optimal performance and long-lasting reliability
- Installation Tip: To save yourself some hassle, please take a picture of the old one before removing it to ensure getting the wires on the correct terminals during replacement
- Safety Precautions: Always follow manufacturer guidelines and safety protocols when installing or replacing furnace components; disconnect power before servicing to ensure safe installation
2. Try the documented clearing action
The cited manual says to perform a power cycle to clear the fault condition. Follow the instructions for your specific system rather than guessing at electrical or control procedures. The manual does not say which earlier soft-lockout condition led to E118, so the code alone does not establish that a particular part has failed.
3. Get professional diagnosis if it persists
If E118 returns after the power cycle, or the system does not resume normal operation, record the alert and contact a Lennox dealer or qualified HVAC professional. Lennox’s troubleshooting FAQ advises recording alert or warning codes and contacting a dealer or Lennox when needed. You can use the Lennox dealer and product-help page to find the appropriate support route.
Rank #2
- Manufacturer Authorzed 32M8801 Furnace Control Board Direct Replacement for Lennox 50A65-121 White Rodgers Integrated Fan Control Circuit Board
What E118 does—and does not—tell you
- It tells you: the cited control’s reset limit was exceeded after six manual exits from soft lockout in 15 minutes.
- It does not tell you: the underlying cause of those soft lockouts, which component is at fault, or whether a repair or replacement is needed.
- It does not establish: a typical repair cost or how often Lennox systems experience this alert.
Diagnosis of the recurring condition requires the correct model-specific service information and the system’s diagnostic history; E118 by itself is not a parts diagnosis.
Quick Recap
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- We have local stores and can deliver your products as soon as possible. All products come with a one-year warranty.
- 100870-03
Rank #4
- 【Compatibility】The 94w83 furnace control board is specifically designed for the Lennox single-stage gas furnace system. It can be used as a direct replacement part for the original factory components, and the compatible models include 81W11, 103085-01, 103085-02, 103085-03, and 1012-977A-I.
- 【Control Function】It uses a microprocessor to achieve precise control, including ignition sequence, flame correction sensing, and delay control of the blower motor. It enables rapid startup and maintains a safe, stable, and efficient operating state.
- 【Easy Installation】The clearly marked terminal connections enable each user to complete the installation easily. It is recommended to take photos of the wiring before removing the old control panel to ensure the accuracy of the new connections and reduce the risk of installation errors.
- 【Durable Materials】It is made of high-precision PCB circuit boards, industrial-grade long-lasting relays, and precise welding techniques, featuring excellent anti-interference ability, electrical stability, and durability.
- 【Working Voltage】It supports a wide voltage input range of 18-30VAC, enabling it to maintain stable operation even when facing voltage fluctuations.
Rank #3
- 【COMPATIBILITY】Compatible with Lennox and White Rodgers models.
- 【MODEL REPLACEMENT GUIDE】Directly replaces models including 32M8801, 10M9301, 12L6901, 56L8401. For these models, follow Program 1. Also compatible with other models requiring Program 2 or 3. Confirming the correct program in the manual is essential for a successful installation.
- 【PACKAGE INCLUDED】1 * Ignition Control Board, 1 * Wiring Harness (9-pin to 12-pin), 1 * Wiring Harness (4-pin to 6-pin), 1 * Mounting Panel, 4 * Stand-off Fasteners, 1 * Circuit Breaker, 1 * 4" Blue Wire, 2 * Wiring Diagrams (for Programs 1 & 2), 1 * Instruction Manual with Diagnostic Chart.
- 【INSTALLATION & TROUBLESHOOTING TIPS】 For a successful installation: (1) First, confirm your required Program (1, 2, or 3) in the manual. (2) Photograph all original wiring before disconnecting. (3) Replace the old circuit breaker with the new one provided. If the system locks or shows errors: (4) Try a full power-off reset or wait 1 hour. (5) For persistent issues, use the professional Diagnostic Chart in the manual to identify causes, which may point to other components. (6) For safety and accuracy, professional installation is strongly advised.
- 【ATTENTIVE SERVICE】If you have any questions before or after purchasing, please feel free to contact us. We work hard to manufacture high-quality products and also work hard to treat every customer with care. Thank you for your choice.
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