York Error Code R7: Ignition Lockout

Severity
Critical
Type
digital display
Estimated repair cost: $100 — $250 (parts + labor)
Warning: This error indicates a potential safety issue with your furnace's ignition system. Shut down the furnace immediately and call a qualified HVAC technician.

How to Fix York Code R7

  1. Step 1: Turn off the furnace. Locate the furnace's power switch (usually on the side of the unit) and switch it to the 'off' position.
  2. Step 2: Check your gas supply. Ensure that the gas supply to your home is turned on. Check other gas appliances to confirm they are working.
  3. Step 3: Call a qualified HVAC technician. Due to the potential safety hazards associated with gas and ignition systems, it's best to have a professional diagnose and repair the problem.

How to Reset York Code R7

  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 R7 Mean?

The R7 error code on your York furnace indicates an 'Ignition Lockout'. This means the furnace attempted to ignite the burners multiple times but failed. After several failed attempts, the control board locks out the ignition sequence as a safety measure to prevent a dangerous buildup of gas. This lockout can be triggered by various issues within the ignition system or problems with the gas supply itself. Continuing to try and reset the furnace without addressing the underlying problem is risky and could lead to a hazardous situation. It's important to address this issue promptly to restore heat and ensure safe operation.

Common Causes

  • Faulty or weak igniter (hot surface igniter or spark igniter)
  • Blocked or restricted gas supply to the furnace
  • Defective gas valve not opening properly
  • Flame sensor not detecting the flame
  • Malfunctioning control board

Diagnostic Steps

If... Check Expected
Furnace is in lockout, gas valve is suspected Measure voltage to the gas valve during an ignition attempt 24VAC
Igniter is suspected Measure resistance of the igniter Typically between 40-90 ohms, but refer to the furnace's service manual for the exact specification.
Flame sensor is suspected of not detecting flame Measure the flame sensor microamp signal when the burners are lit Typically 2-10 microamps DC. Refer to the furnace's service manual for the exact specification.
Gas pressure is suspected Measure gas pressure at the gas valve Refer to the furnace's rating plate for the correct manifold pressure (typically around 3.5" WC for natural gas).

Applicable York Models

Replacement Parts

Part OEM Number Est. Cost Where to Buy
Hot Surface Igniter 025-43599-000 — Find Part
Gas Valve 025-39583-000 — Find Part
Flame Sensor 025-40632-000 — Find Part

Related Codes on Same Models

Other codes that affect the same York model families as R7.

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
R5 Rollout Switch Open Critical
R6 Gas Valve Failure Critical
R9 Reversed Polarity Critical