Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1993SABLE GS, 4D SEDAN, 3.0 U, AXODEREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - AUTOMATICTESTINGEATC SELF-DIAGNOSTIC TESTENTERING SELF-DIAGNOSTICS
1993 Mercury Sable GS, 4D Sedan, 3.0 U, AXODE
Entering Self-Diagnostics
1993 Mercury Sable GS, 4D Sedan, 3.0 U, AXODESECTION Entering Self-Diagnostics
- Simultaneously depress OFF and FLOOR buttons, then press AUTOMATIC button within 2 seconds. Display will be blank for up to 20 seconds while test is running.
- If display is blank for more than 20 seconds, go to DIAGNOSIS WHEN EATC SELF-DIAGNOSTICS INDICATE NO ERRORS FOUND . If codes are displayed, repair all error codes in order, from lowest number to highest number. See ERROR CODE DIAGNOSIS.
- Self-diagnostics can be initiated at any time with the resulting error codes being displayed. Normal system operation is stopped when system is in self-diagnostic mode.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.