Case IH 2917: Cab pressure/blower motor relay fault

The specific fault code 2917 could not be explicitly verified in the available online Case IH OEM documentation. However, a cab pressure/blower motor relay fault generally indicates that the circuit controlling the cab's HVAC blower motor (which pressurizes the cab to keep dust out) has experienced an open circuit, short circuit, or thermal overload, causing the blower to shut off periodically or fail completely.

• Steiger T4B
• 1620
• 1640
• 1670
• 1680
• 1822
• 1844
• 2055
• 395
• 495
• 585
• 595
• 685
• 695
• 885
• 895
• 995
• 2294
• 2390
• 2394
• 2594
• 3394
• 3594
• 7110
• 7120
• 7130
• 7140
• 7150
• 9130
• 9150
• Magnum series

1. 1

   Check the fuse block for blown or physically hot fuses, which can indicate excessive amperage draw from a failing blower motor.

2. 2

   Inspect relay connections for melted contacts or loose connections. Relays may be located behind the digital dash panel, in the overhead panel, or under the cab/starter.

3. 3

   Test the blower motor switch on the fan lever to verify it is operating correctly, as switch failures can mimic relay failures.

4. 4

   Monitor blower motor behavior. If the fan starts, shuts off on its own, and restarts, the blower motor itself may be failing and causing the relay or breaker to trip.

1. 1

   Locate the Relay

   Depending on your Case IH model, access the relay block. For models like the 9130/9150, access the overhead panel. For models like the 2390, remove the four dash screws and move the digital dash panel out of the way, or check the right side of the engine under the starter.

2. 2

   Remove the Faulty Relay

   Pull the affected blower motor relay from the block.

3. 3

   Clean Contacts

   Clean the wiring harness connections and terminals to ensure there is no corrosion or melted plastic causing high resistance.

4. 4

   Install the New Relay

   Plug the replacement relay into the block.

5. 5

   Reassemble and Test

   Reinstall the dash panel or overhead cover. Turn the key to the ON position and test the A/C and blower motor across all fan speeds to ensure the cab pressurizes and the fan does not cut out.