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.
Cold Start Mode
If in-vehicle temperature is lower than the selected temperature, the A/C-heater control panel will activate the cold start function. If coolant temperature is below 167°F (75°C), air-flow will be directed toward windshield. When coolant temperature is greater than 122°F (50°C), air distribution will be directed to windshield and floor.
In cold start mode, blower fan current is also dependent on coolant temperature. At coolant temperatures up to 104°F (40°C), blower fan current is 5.5 amps, with a linear increase in fan current of up to 10 amps at 176°F (80°C). After this, there is a linear increase in fan current to 15 amps at 194°F (90°C). The A/C-heater control panel returns to its normal operating mode as soon as in-vehicle temperature reaches the selected temperature.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.