Main Heater System

1999 Dodge and Ram Caravan Base, 2.4 BSECTION Main Heater System

Heater system is a blend-air type. Outside air enters heater system through cowl grille and passes through plenum chamber to heater unit. Blend-air door, located inside heater unit, routes incoming air through or past heater core. Amount of blended air is controlled by temperature control lever. Air distribution is controlled by mode selection and blower speed.

WARNING: To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article In GENERAL SERVICING.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.