Goodman Error Code 3: Pressure Switch Stuck Open

Severity
Warning
Type
led blink count
Where to look
sight glass
Estimated repair cost: $75 — $200 (parts + labor)
Warning: Your Goodman HVAC system has detected a pressure switch issue, which could lead to system damage if not addressed promptly.

LED Blink Pattern

LED blinks 3 times.

How to Fix Goodman Code 3

  1. Check if your HVAC system is running. If it is, turn it off at the thermostat and at the circuit breaker to prevent further damage.
  2. Inspect the air filter. If it's clogged, replace it with a new one.
  3. Call a professional HVAC technician to diagnose and repair the issue. Do not attempt to open the unit or handle refrigerant lines yourself.

How to Reset Goodman Code 3

  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 Goodman Error Code 3 Mean?

Goodman's error code 3 indicates that the pressure switch is stuck open. This switch is crucial for monitoring and controlling the refrigerant pressure in your HVAC system. When it's stuck open, it can't accurately sense the pressure, leading to potential system issues. This is typically caused by a faulty switch or low refrigerant levels, which can cause the switch to open prematurely.

Common Causes

  • Faulty pressure switch
  • Low refrigerant levels
  • Air or moisture in the system
  • Blocked or restricted refrigerant flow

Diagnostic Steps

If... Check Expected
System is running Listen for unusual noises coming from the outdoor unit Normal operation sound
System is off Check the pressure switch for any visible damage or signs of leakage No visible damage or leakage
You have access to a manifold gauge set Measure the refrigerant pressure at the service ports Normal refrigerant pressure for your system

Applicable Goodman Models

Recall Notices

Goodman/Daikin Evaporator Coil Drain Pans Recalled Due to Fire Hazard 22-014 Active

Issued: November 1, 2021

Affected models: Molded plastic evaporator coil drain pans in up-flow condensing gas furnaces

Drain pans can overheat, melt, and deform, posing a fire hazard. Recall expanded January 2024.

View official notice

Replacement Parts

Part OEM Number Est. Cost Where to Buy
Pressure Switch G120002 — Find Part
Refrigerant — — —

Related Codes on Same Models

Other codes that affect the same Goodman model families as 3.

Code Description Severity
1 System Lockout Warning
2 Pressure Switch Stuck Closed Warning
4 Open High Limit Switch Warning
5 Flame Sensed With Gas Valve Off Warning
6 Open Rollout Switch Warning
7 Low Flame Signal Warning
8 Ignitor Error Warning
CONTINUOUS Reversed Polarity Warning
F01 Goodman Code F01 - Ignition Lockout Critical
STEADY-ON Normal Operation Info