Goodman furnace P2: High stage compressor, heating mode
P2 means the heat pump is heating on its high stage. It is the heat pump working harder before the system hands over to the furnace.
Applies to: Goodman GMVC96, GMVM97, GCVC96, GCVM97 and Amana AMVC96, AMVM97 series gas furnaces with a two-character alphanumeric display, installed as part of a dual fuel system with a two-stage heat pump.
What it means
A two-stage heat pump has a low and a high output, and P2 means it is running on high. On a dual fuel system this typically happens as conditions get colder, before the switchover point where the gas furnace takes over. Seeing P2 for long periods suggests the system is near that boundary. It is normal operation, and its diagnostic value is contextual: a heat pump sitting at high stage while the house fails to keep up means the switchover point may be set too low, leaving the heat pump doing work the furnace should have taken.
Most common causes
- The heat pump running at full output as conditions get colder. This is normal.
- A recovery period after a thermostat setback.
- Outdoor conditions approaching the dual fuel switchover point.
- A switchover point set lower than is efficient for the property.
How to diagnose it
- Confirm the system is dual fuel with a two-stage heat pump.
- Note the outdoor temperature and whether the house is keeping up.
- Note whether the system eventually switches to the furnace as it gets colder.
- If the heat pump sits at high stage for long periods without maintaining temperature, the switchover point is worth reviewing.
How to fix it
- Nothing to fix if the house is comfortable and the system switches over as it gets colder.
- If the heat pump runs flat out without keeping up, have the switchover configuration reviewed.
- Check the air filter and registers if the house is not reaching temperature.
- Have the heat pump's refrigerant charge checked if performance has degraded over time, since that reduces capacity.
Notes
Dual fuel switchover is a comfort and cost trade-off rather than a fixed correct answer. Where it should sit depends on local energy prices and the property, which is why it is worth a conversation rather than a default.
Related
All codes for this manufacturer
Goodman and Amana furnace fault codes — every code, with what differs between models.
Models this code appears on
From the manufacturer's per-model database. If your model is not listed, this code may not exist on your board, or it may mean something different — check the model page.
- Goodman GCVC96 / GCVC8 / GCVC95 / GMVC95 and Amana ACVC95 / ACVC96 / AMVC95 / AMVC96
- Goodman GCVM97 / GCVM96 / GMVM96 / GMVM97 and Amana ACVM96 / ACVM97 / AMVM96 / AMVM97
- Goodman GMVC96 / GMVC8
What the fix costs
P2 for a spell in cold snaps costs nothing — it is the heat pump using its full output before gas takes over. The repair conversations start when P2 becomes a residence: a heat pump pinned at high stage that cannot hold the house points at the switchover configuration, or at capacity lost to a slow refrigerant leak, and both start from a $75–150 diagnostic (repair cost guide). Charge work and leak-finding are outdoor-unit repairs quoted on their own; a switchover reconfiguration, by contrast, is often just labour within the visit — which is why the diagnosis order matters and is worth asking about.
DIY or call a pro?
DIY is observation plus the usual airflow basics: filter, registers, and noting the outdoor temperature at which the furnace finally fires. If it never does, say exactly that when booking. Professional territory is everything that moves the boundary — the switchover setpoint is a comfort-versus-cost decision that should be set deliberately with local fuel prices in mind, not nudged by trial and error, and the refrigerant side is licence-controlled. Resist the urge to solve a struggling P2 by dropping the thermostat to force gas heat; it masks the fault the display is showing you.
What this looks like
From the outside, this usually shows up as there is no heat but nothing looks obviously wrong — that walkthrough covers what to check in order, and when it stops being a homeowner job.