Rapid amber flash Weak flame signal

What the control is telling you

The LED flashes amber continuously with no pause: flame current has dropped low. On the TM9V the warning starts at 1.5 microamps (normal about 3.7 microamps DC; lockout at 0.1).

Applies to: York/JCI residential gas furnaces: York UTEC IFC furnaces, York White-Rodgers IFC furnaces, York TM9V

Likely causes

• Dirty or oxidized flame sensor
• Poor ground path from burner to board
• Low gas pressure / weak flame on the sensor
• Cracked sensor insulator

Test and repair steps

1. Measure flame current at the board test pad - it should be above 1.5 microamps.
2. Clean the flame sensor rod with fine abrasive pad and refit.
3. Check burner/ground connection and the sensor wire.
4. Verify inlet and manifold gas pressure and that the flame fully envelops the sensor.
5. Replace the sensor if the reading stays low.

Settings for these units

Clearance to combustibles · York TM9V

Leave about 24 in. at the front and 18 in. at the side for service.

Approved for alcove and attic installs.

Filter size by return location · York TM9V

Sizes assume high velocity filters (600 FPM); throwaway filters must stay at or below 300 FPM.

Filters go outside the cabinet - never inside the furnace.

Models that show this code

7 models in York UTEC IFC furnaces, York White-Rodgers IFC furnaces, York TM9V

Other codes on the same units

• 9 red flashes Polarity reversed or bad ground
• 10 red flashes Gas valve powered with no heat call
• 11 red flashes Limit open 5-15 minutes - blower failure
• 12 red flashes Hot surface igniter open / igniter failure
• 13 red flashes High-fire pressure switch open
• LED steady off Board LED dark - no power to control
• Rapid red flash Twinning error or wrong 24 V phasing
• Steady on (any color) LED lit solid - internal control fault