Heater Box with Resistor | With AC | 1969-70 Ford Mustang

Restore dependable cabin heat in your 1969-1970 Ford Mustang 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 Mustang HVAC system clean, functional, and restoration-ready.

• Designed for A/C Mustangs: Fits 1969-1970 Ford Mustang models equipped with air conditioning.
  
  
• Restores heating performance: Helps direct hot 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 needed 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 right direction for better drivability and cabin comfort.
  
  
• Restoration-ready fit: Ideal for refreshing your classic Mustang’s heating system during an HVAC or interior rebuild.
  
  

This heater box with resistor is a practical restoration upgrade for 1969-1970 Mustang 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 Mustang’s HVAC system.

Bring warm, reliable comfort back to your A/C-equipped 1969-1970 Mustang with a durable heater box built for restoration confidence.