York Error Code R2: Pressure Switch Stuck Closed

Severity
Warning
Type
digital display
Estimated repair cost: $75 — $200 (parts + labor)
Warning: Your York furnace has detected a problem with its pressure switch and has shut down as a safety precaution. This requires diagnosis and repair.

How to Fix York Code R2

  1. Step 1: Check the furnace filter. A severely clogged filter can sometimes restrict airflow enough to affect the pressure switch. Replace it if it's dirty.
  2. Step 2: Visually inspect the vent pipe outside your home for any obvious obstructions like snow, ice, or debris. Safely clear any blockage you can reach.
  3. Step 3: Try resetting the furnace by turning off the power at the breaker for a few minutes, then turning it back on. This might clear a temporary error.
  4. Step 4: If the problem persists after these steps, call a qualified HVAC technician to diagnose and repair the issue.

How to Reset York Code R2

  1. Turn off the furnace power switch, usually located on or near the unit.
  2. Turn off the circuit breaker for the furnace. Wait 30 seconds.
  3. Restore power at the breaker and flip the furnace switch back on.
  4. Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does York Error Code R2 Mean?

The "R2" error code on your York furnace indicates that the pressure switch is stuck in the closed position. This switch is designed to prove that the inducer motor is creating enough suction to safely vent exhaust gases outside your home. When the furnace starts, the inducer motor turns on, creating a vacuum that pulls the pressure switch closed. The control board expects this switch to be open before the inducer starts and close once the inducer is running. If the switch is already closed before the inducer starts, the control board assumes something is wrong and locks out the furnace to prevent potentially dangerous operation. This could mean the switch is faulty, there's a blockage in the venting, or an issue with the inducer motor itself. Because the furnace won't run, you'll have no heat until this is resolved.

Common Causes

  • Faulty pressure switch: The switch itself is defective and stuck closed.
  • Blocked vent pipe: Obstruction in the vent pipe is causing backpressure, keeping the switch closed.
  • Stuck inducer motor: The inducer motor is not starting, so the switch is not opening.
  • Wiring issue: Short in the wiring between the pressure switch and the control board.
  • Defective control board: The control board is misreading the pressure switch signal.

Diagnostic Steps

If... Check Expected
Furnace is calling for heat and inducer motor is off Measure voltage across the pressure switch terminals 0 VAC (switch closed)
Pressure switch is closed with inducer off Disconnect one wire from the pressure switch and measure resistance across the switch terminals 0 ohms (switch closed)
Pressure switch is open with inducer off Inspect the vent tubing connected to the pressure switch for kinks, cracks, or obstructions Tubing is clear and in good condition
Vent tubing is clear Check the inducer motor windings for continuity Low resistance reading (typically < 10 ohms)

Applicable York Models

Replacement Parts

Part OEM Number Est. Cost Where to Buy
Pressure Switch 024-36683-000 — Find Part
Inducer Motor Assembly S1-02435933000 — Find Part
Control Board S1-33102974000 — Find Part

Related Codes on Same Models

Other codes that affect the same York model families as R2.

Code Description Severity
A4 Improper Thermostat Wiring Warning
AF Low Flame Current Critical
R1 Flame Without Call Critical
R3 Pressure Switch Stuck Open Warning
R4 High Limit Switch Open Warning
R5 Rollout Switch Open Critical
R6 Gas Valve Failure Critical
R7 Ignition Lockout Critical
R9 Reversed Polarity Critical