Goodman furnace 2 flashes: Pressure Switch Stuck Closed
Professional repair
What does 2 flashes mean on a Goodman furnace? The control sees the pressure switch closed while the induced-draft blower is OFF — it waits until the fault clears. Officially: a faulty pressure switch or shorted wiring.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
GOOD NEWS: THE FIRST CHECKS ARE FREE AND TAKE MINUTES.
Try these first — in this order
Only check for loose or pinched wires at the switch.
Low-voltage circuit diagnosis is a tech job. DIY part cost: $25–60 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Faulty pressure switch (official first cause) TECH
- Short in the pressure-switch wiring TECH
Parts referenced by this code
Always match parts against your model's parts list — part numbers vary within a series.
Questions about this code
What does 2 flashes mean on a Goodman furnace?
The control sees the pressure switch closed while the induced-draft blower is OFF — it waits until the fault clears. Officially: a faulty pressure switch or shorted wiring.
How do I fix Goodman furnace 2 flashes?
There is nothing safe for a homeowner to adjust here. A technician should test the switch and its wiring; never bypass the switch.
How much does it cost to fix Goodman furnace 2 flashes?
Cost varies with what the technician finds. The manual points to a faulty pressure switch or shorted wiring, and those are different repairs with different parts and labor.
Related symptoms
These symptoms can appear alongside this code. The link is an association, not a diagnosis, and code meanings vary by brand, model and control.
Applies to
GMS8 · GDS8 · GHS8 · GMSS96 · GMH8 · GDH8
Different Goodman generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against Goodman GMS8/GDS8/GHS8 Service Manual (RS6612006), p.42-43 — “two short flashes followed by a longer pause”
Verified against Goodman GMSS96 Service Manual, p.32
Last verified 2026-07-06 · page updated 2026-10-07 · how we verify
Related Goodman furnace codes
These codes use the same single red led — flash codes system.
| Pattern | Meaning |
|---|---|
| 1 flash | Ignition Lockout — Flame Not Established After 3 Tries |
| 3 flashes | Pressure Switch Stuck Open |
| 4 flashes | Open Primary Limit Switch |
| LED off | No LED Signal |