York Error Code R5: Rollout Switch Open

Severity
Critical
Type
digital display
Estimated repair cost: $75 — $200 (parts + labor)
Warning: This error indicates a potential fire or carbon monoxide hazard. Shut down the furnace immediately and call for professional service.

How to Fix York Code R5

  1. Step 1: Immediately turn off the furnace at the thermostat.
  2. Step 2: Shut off the gas supply to the furnace. There is usually a valve on the gas line near the unit.
  3. Step 3: Open windows and doors to ventilate the area.
  4. Step 4: Call a qualified HVAC technician or your gas company for immediate inspection and repair.

How to Reset York Code R5

  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 R5 Mean?

The R5 error code on your York furnace indicates that the rollout switch has tripped. This switch is a critical safety device designed to shut down the furnace if it detects flames where they shouldn't be – specifically, outside the normal burner area. This is a serious issue because it means there's a risk of fire or carbon monoxide poisoning. The rollout switch is a small, often red, button located near the burners. When it senses excessive heat from a 'rollout' flame, it opens the circuit, cutting off gas flow to the burners. Ignoring this error can lead to dangerous conditions, so it's important to address it immediately.

Common Causes

  • Blocked or dirty burners causing flame rollout
  • Cracked or damaged heat exchanger allowing flames to escape
  • Insufficient combustion air supply leading to incomplete combustion
  • Failed or misaligned burner assembly
  • Faulty rollout switch (less common, but possible)

Diagnostic Steps

If... Check Expected
Rollout switch is tripped (open circuit) Visually inspect the burners for blockages or damage. Clean, properly aligned burners.
Burners appear normal Inspect the heat exchanger for cracks or holes using a combustion analyzer to detect CO leaks. No CO detected in the supply air.
Heat exchanger is intact Check the combustion air intake for obstructions. Clear and unobstructed air intake.
All components appear normal Test the rollout switch for continuity. Reset the switch and measure voltage across the terminals while the furnace attempts to start. Closed circuit (continuity) when reset, open circuit when tripped. Proper voltage when furnace starts.

Applicable York Models

Replacement Parts

Part OEM Number Est. Cost Where to Buy
Rollout Switch S1-03102747000 — Find Part
Gas Valve S1-03102677000 — Find Part
Heat Exchanger — — —

Related Codes on Same Models

Other codes that affect the same York model families as R5.

Code Description Severity
A4 Improper Thermostat Wiring Warning
AF Low Flame Current Critical
R1 Flame Without Call Critical
R2 Pressure Switch Stuck Closed Warning
R3 Pressure Switch Stuck Open Warning
R4 High Limit Switch Open Warning
R6 Gas Valve Failure Critical
R7 Ignition Lockout Critical
R9 Reversed Polarity Critical