Flame LED rapid blink Amber flame LED - unexpected flame

What the control is telling you

Amber flame LED blinking rapidly means flame is sensed when it should not be. See code 14.

Applies to: 802P/80MDP (802PA050-150); R95P (R95PA040-115); Rheem (-)GRC upflow and (-)GTC downflow/horizontal 90 Plus condensing gas furnaces (UT Electronic Controls 1012-925 / 1028-928 and Invensys ICC-H1MC7-01 IFC); Rheem 90RJ and 90TJ 90 Plus condensing gas furnaces (UT Electronic Controls 1012-925 or Invensys ICC-H1MC7-01 IFC, hot surface ignition)

Likely causes

• Gas valve leaking or stuck open
• IFC gas valve relay stuck / voltage at valve with no call
• Gas valve leaking through or not shutting off
• Voltage still present at the gas valve after W is off
• Faulty IFC

Test and repair steps

1. Warning: If flame stays on, close the manual gas valve before cutting power.
2. Confirm W to C = 0 V at the IFC.
3. Check for voltage at the gas valve; check gas valve and IFC.
4. See code 14.
5. Warning: If gas does not shut off, close the manual gas valve to the appliance before shutting off electrical power - risk of fire or explosion.
6. With the thermostat off, confirm W to C is 0 V at the IFC.
7. Check for voltage at the gas valve; if voltage is present with W off, check the IFC.
8. If no voltage is present and burners/flame persist, replace the gas valve.

Settings for these units

Filter sizes (Table 12) · Rheem 90RJ/90TJ 90 Plus

Filters are not factory-installed; they must be field supplied.

Side filter on 21 in. units: cut 3.5 in. off the filter and frame; on 24.5 in. units cut 7 in.

Minimum clearance to combustibles · Rheem 90RJ/90TJ 90 Plus

Same values for every cabinet size.

24 in. service clearance recommended in front of all furnaces.

• Filter sizes (Table 9) · Rheem (-)GRC/(-)GTC 90 Plus
• Minimum clearance to combustibles · Rheem (-)GRC/(-)GTC 90 Plus
• Clearance to combustibles (all models) · R95P
• Reduced clearance to combustibles, upflow/horizontal (Fig. 4) · Rheem/Ruud 802P / 80MDP 80% two-stage furnace (UT 1028-928 IFC)

Models that show this code

34 models in Rheem/Ruud 802P / 80MDP 80% two-stage furnace (UT 1028-928 IFC), R95P, Rheem (-)GRC/(-)GTC 90 Plus, Rheem 90RJ/90TJ 90 Plus

Other codes on the same units

• 55 Pressure switch stuck closed
• 57 Pressure switch stuck open
• 58 Water sense circuit open
• 59 Water sensed / blocked drain
• 61 Blower fault - blower not running
• 93 Internal control fault
• Flame LED off No flame sensed (troubleshooting aid)
• Flame LED slow blink Amber flame LED - marginal flame sense