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Four Seasons 73749 HVAC Blend Door Actuator
| Brand | Four Seasons 73749 |
|---|---|
| Door Linkage | Gear |
| Mounting Ear Qty. | 3 |
| Style | Hvac air door actuator |
| Terminal Pin Qty. | 5 |
| Fits | Fiat and Mazda · 12 vehicles |
Direct replacement. Built for compatible HVAC blend door systems with a gear-driven linkage.
Secure mounting. Features a 3-ear mounting style and 5-pin terminal layout.
Trusted experience. Backed by Four Seasons' long history in mobile A/C components.
Cross-references Four Seasons 73749, 68314268AA and N24361A60 for the same application. See all 3.
HVAC Blend Door Actuator Overview
The Four Seasons 73749 HVAC blend door actuator restores precise control of cabin air temperature and airflow direction. It is built for direct replacement use in compatible HVAC systems and is backed by Four Seasons' long experience in mobile A/C components.
Compatible With Mazda MX-5 and Fiat 124 Spider applications, this actuator uses a gear-driven door linkage, a 5-pin terminal layout, and a 3-ear mounting style for a secure HVAC installation. The Four Seasons 73749 is a practical choice when the blend door stops responding correctly or moves inconsistently.
- Gear-driven HVAC air door actuator
- 5-terminal electrical connection
- 3-ear mounting design
- Direct replacement for compatible HVAC blend door systems
- Four Seasons part number 73749
Detailed Product Description
The Four Seasons 73749 is an HVAC blend door actuator used to control the internal air door that regulates temperature mix inside the climate system. In Mazda MX-5 and Fiat 124 Spider fitments, this part helps restore normal HVAC operation when the original actuator no longer moves the door correctly, produces erratic temperature changes, or fails to respond to control inputs. The gear linkage design supports consistent movement of the air door, while the 5-pin terminal configuration and 3-ear mounting layout match the specified application requirements. If you are replacing a failed HVAC blend door actuator on a Mazda MX-5 or Fiat 124 Spider, Four Seasons 73749 provides a direct-fit service part for the listed vehicles.
Common Issues It Can Address
- Inconsistent cabin temperature control
- HVAC air door not moving as commanded
- Temperature stuck on hot or cold
- Clicking or binding from the climate control system
- Loss of proper air mix function in the HVAC housing
Installation Notes and Tips
Verify the connector style, mounting ear count, and actuator type before installation. Confirm the HVAC system diagnosis so the blend door actuator is replaced only when the air door motor or linkage is the source of the fault. Match the part number 73749 to the listed fitment before service.
Quality Assurance
Four Seasons states that its products are engineered and tested for years of trouble-free operation. The brand also draws on more than 50 years of mobile A/C experience in HVAC and climate control components.
| Year | Make | Model | Notes |
|---|---|---|---|
| 2023 | Mazda | MX-5 | — |
| 2022 | Mazda | MX-5 | — |
| 2021 | Mazda | MX-5 | — |
| 2020 | Fiat | 124 Spider | — |
| 2020 | Mazda | MX-5 | — |
| 2019 | Fiat | 124 Spider | — |
| 2019 | Mazda | MX-5 | — |
| 2018 | Fiat | 124 Spider | — |
| 2018 | Mazda | MX-5 | — |
| 2017 | Fiat | 124 Spider | — |
| 2017 | Mazda | MX-5 | — |
| 2016 | Mazda | MX-5 | — |
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