1. Identification:
* Find your part number: Before ordering anything, locate the part number on your existing heater control unit. This is crucial for accurate replacement. The part number is usually stamped on the unit itself or found on the sticker on the back. Take a clear picture of this number.
* Determine the style: Take note of the type of control you have. Is it a simple slider, rotary knobs, or a more complex climate control unit with automatic features? This will narrow down your search.
2. Sourcing a Replacement:
* Use the part number: This is the most reliable method. Use your part number to search online at auto parts stores (AutoZone, Advance Auto Parts, Napa Auto Parts, etc.), salvage yards, or online retailers like eBay.
* Search by vehicle: If you can't find the part using the number, try searching by your vehicle's year, make, model, and trim level (E150, E250, E350 variations exist). Be aware that even with the same year and model, there might be subtle differences in the heater control units.
* Salvage yards: Salvage yards can be a great option for finding used parts, often at a lower cost. Just make sure the part is in good working condition before purchasing.
3. Year Compatibility:
Unfortunately, there's no simple answer to which years' heater controls are compatible. Even within the 1990s Ford E-Series vans, changes were made throughout the production run. Direct interchangeability between different years is NOT guaranteed. You'll likely encounter differences in connector plugs, mounting points, or even the physical dimensions of the unit.
4. Installation (General Steps - Consult a Repair Manual):
This is a complex process requiring patience and some mechanical aptitude. A repair manual specific to your 1996 Ford E150 is strongly recommended. It will provide detailed instructions and diagrams. Here's a general overview:
* Disconnect the battery: This is crucial for safety.
* Remove the radio and other dash components: You'll likely need to remove the radio, possibly the ashtray, and other parts of the dashboard to access the heater control.
* Unplug the wiring harness: Carefully disconnect the electrical connectors from the old heater control unit. Take photos or make notes of the connections before disconnecting to ensure you reconnect correctly.
* Remove the screws and mounting brackets: Carefully remove the screws or clips holding the old heater control in place.
* Install the new heater control: Reverse the removal process to install the new unit. Ensure the new unit is correctly seated and securely fastened.
* Reconnect the wiring harness: Double-check your connections against your notes or photos.
* Reconnect the battery: Carefully re-attach all the dash components.
* Test the system: Turn the ignition on and test all functions of the new heater control.
Caution: If you're not comfortable working on automotive electrical systems and disassembling the dashboard, it's best to take your vehicle to a qualified mechanic. Improper installation can lead to electrical issues or damage to your dashboard.
