Splice powered exhaust harness wire W41(BU) to powered exhaust harness plug 6P14 wire 136B(RED)
Remove plug 6P18 (single blue wire) from the Economizer Module EXF/GND terminal.
Plug powered exhaust harness plug 6P14 to the Economizer Module EXF/GND terminal.
Below is what it should look like when you are done.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.