Generac — Test 41 - CO Module Verification Test
Testing & diagnosis
From a Generac service manual covering: GP1000, GP1100, GP1800, GP2000, GP2200, GP2600, GP2800, GP3250, GP3300, GP3600, GP5000, GP5500…. Check it applies to your exact model before use.
Applies to: Generac GP1800, Generac GP3250, Generac GP3300, Generac GP5000
Before you start
- Do NOT insert the drill bit into the LED holes; damage to the LEDs will occur
Procedure
- Do not install CO badging (decal) prior to performing this test
- Run generator under normal operation with no CO module notifications for a minimum of 65 seconds
- With generator running, insert blunt end of a 3/64 inch drill bit into test switch hole
- Hold the drill bit against the mounting panel until notification LEDs appear and generator shuts off
- Successful pin test shows both LEDs on solid (not blinking)
Tools required
- 3/64 inch drill bit Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Generac GP1800 →, Generac GP3250 →, Generac GP3300 →, Generac GP5000 →
Source: Generac 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.