Description
The Weil McLain 591-391-985 is an OEM replacement wiring harness designed to provide a secure, factory-correct electrical connection between the wall control and the control module on Weil McLain GV90+ series gas boilers. Maintaining the integrity of this connection is critical to proper boiler operation, accurate control signaling, and reliable system performance.
Product Overview
This harness is engineered specifically for the GV90+ boiler platform, ensuring a direct plug-and-play replacement that eliminates guesswork during service or installation. Using a genuine Weil McLain OEM part preserves system reliability and helps protect your warranty.
Key Features
- OEM Weil McLain replacement wiring harness
- Connects wall control to control module on GV90+ boilers
- Direct plug-and-play fit — no modification required
- Maintains factory-correct electrical signal integrity
- Designed for use with Weil McLain GV90+ series gas boilers
- Supports accurate control module communication and boiler operation
Compatible Equipment
- Weil McLain GV90+ Series Gas Boilers
Why Choose OEM Parts?
OEM wiring harnesses are manufactured to exact factory specifications, ensuring proper fit, correct connector types, and appropriate wire gauges for the application. Aftermarket substitutes may introduce compatibility issues or unreliable connections. Trust genuine Weil McLain parts to keep your boiler running at peak efficiency.







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