Heater Box with Resistor | With AC | 1971-73 Mercury Cougar

Restore dependable cabin heat in your 1971-1973 Mercury Cougar with this heater box with resistor designed for A/C-equipped cars. Built to replace a broken, leaking, or missing heater box, it helps direct warm air through the vehicle for improved comfort while keeping your classic Cougar HVAC system clean, functional, and restoration-ready.

• Designed for A/C-Equipped Cougars: Fits 1971-1973 Mercury Cougar models equipped with air conditioning.
  
  
• Restores Heating Performance: Helps direct warm air into and throughout the cabin during cooler weather.
  
  
• Replaces Worn Heater Boxes: A smart solution for broken, leaking, damaged, or missing original heater box assemblies.
  
  
• Includes Resistor: Built with the required resistor for a more complete heater box replacement.
  
  
• Durable Lightweight Construction: Made from sheet molding compound for strength without unnecessary weight.
  
  
• Comfort-Focused Upgrade: Helps ensure warm air is routed in the proper direction for better drivability and cabin comfort.
  
  
• Restoration-Ready Fit: Ideal for refreshing your classic Cougar’s heating system during an HVAC or interior rebuild.
  
  

This heater box with resistor is a practical restoration upgrade for 1971-1973 Mercury Cougar owners with factory air conditioning. Original heater boxes can crack, leak, warp, or go missing over time, leaving the heating system weak or unable to send warm air where it belongs.

Constructed from a lightweight yet durable sheet molding compound, this replacement heater box is built to support long-term function while keeping the installation clean and factory-inspired. It helps restore comfort, drivability, and confidence to your classic Cougar’s HVAC system.

Bring warm, reliable comfort back to your A/C-equipped 1971-1973 Mercury Cougar with a durable heater box built for restoration confidence.