Heil G80CTL furnace 2 amber flashes: Pressure stays closed
Professional repair
What do 2 amber flashes mean on a Heil G80CTL Series A furnace? Two amber flashes mean the pressure switch feedback is still closed at a point where the control expects it to be open. The control will not continue the heating sequence on that signal.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
A technician should check the pressure tubing and the switch's actual state against the expected sequence. Jumpering or tapping the switch is never a fix, and replacing it should follow testing.
Possible causes
- Blocked or obstructed pressure switch tubing TECH
- Pressure switch contacts stuck in the closed position TECH
Parts for this code
No model-verified part number is listed here. Have the fault diagnosed and the correct part matched to your furnace before ordering.
Questions about this code
What do 2 amber flashes mean on a Heil G80CTL Series A furnace?
Two amber flashes mean the pressure switch feedback is still closed at a point where the control expects it to be open. The control will not continue the heating sequence on that signal.
How do I fix Heil G80CTL furnace 2 amber flashes?
Arrange a service visit and give the technician the model, Series and flash count. Blocked tubing is one listed cause, so a new switch is not automatically the answer. Do not bypass it or try repeated restarts.
How much does it cost to fix Heil G80CTL furnace 2 amber flashes?
The bill depends on whether the fault is in the tubing or the switch itself. A replacement switch must carry the exact rating specified for this furnace.
Applies to
Heil G80CTL Series A
Different Heil generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against F80CTL & G80CTL (Series A): Installation, Start-Up, Operating and Service and Maintenance Instructions, p.34
Verified against F80CTL & G80CTL (Series A): Installation, Start-Up, Operating and Service and Maintenance Instructions, p.38
Verified against F80CTL & G80CTL (Series A): Installation, Start-Up, Operating and Service and Maintenance Instructions, p.47
Last verified 2026-10-07 · page updated 2026-10-07 · how we verify
Related Heil furnace codes
These codes use the same heil g80ctl series a amber led control system.