Kohler — Controller Replacement Procedure, Models 14RESA and 20RESA/B/C/D
Repair & overhaul
From a Kohler service manual covering: 10RESV, 12RESV, 14RCA, 14RES, 20RCA, 20RES, 24RCL, 30RCL, 38RCL, 38RCLB, 48RCL, 48RCLB…. Check it applies to your exact model before use.
Applies to: Kohler 10RESV, Kohler 12RESV, Kohler 14RCA, Kohler 14RES, Kohler 20RCA, Kohler 20RES, Kohler 24RCL, Kohler 30RCL, Kohler 38RCL, Kohler 38RCLB, Kohler 48RCL, Kohler 48RCLB
Before you start
- Do not load settings from a green-board controller onto a red/blue-board controller or vice versa
Procedure
- Review service kit information and confirm correct kits
- Open enclosure roof
- Press OFF button, disconnect utility power, verify with voltmeter
- Disconnect starting battery, negative lead first
- Remove two mounting screws, lift controller, disconnect harnesses
- Remove old controller
- If replacing original green-board controller with revised controller, install relay/breaker kit GM95104
- Reconnect harnesses, install new controller, reconnect battery negative last
- Reconnect utility power
- Set date/time/exerciser, update firmware, run Controller Setup and Voltage Calibration
- Replace covers/panels; reset OnCue password if used
Tools required
- voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Kohler 14RCA →, Kohler 14RES →, Kohler 20RCA →, Kohler 20RES →, Kohler 24RCL →, Kohler 30RCL →, Kohler 38RCL →, Kohler 48RCL →, Kohler 48RCLB →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.