Relays / Sensors / Resistors
The air-conditioning fan relay is used in the cooling and climate-control system of Porsche 924, 924S, and 944 models. This relay controls power delivery to the A/C condenser fan, ensuring the fan switches on at the correct time to support refrigerant cooling and maintain proper system pressure.
Fits:
Porsche 924 1979 - 1985
Porsche 924S 1986 - 1988
Porsche 944 1982 - 1985
* Please check and match the part number of your relay in your car before ordering.
This A/C fan relay:
• Supplies power to the A/C condenser fan whenever system pressure or temperature demands additional cooling
• Ensures stable switching performance for consistent fan operation
• Helps maintain proper refrigerant pressure and improves overall A/C cooling efficiency
• Replaces failing relays that cause intermittent or non-working condenser fans
A faulty A/C fan relay can lead to:
• Weak or non-functioning air-conditioning
• A/C system overheating or high system pressure
• Poor cabin cooling performance
• Erratic or noisy fan operation
• Potential stress or damage to A/C components (compressor, hoses, pressure switch)
Replacing the relay restores proper climate control performance and ensures the A/C system operates safely and efficiently.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94461511303
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
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12 Month Warranty
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Fits:
Porsche 924 1979-85
Porsche 924S 1986-88
Porsche 944 1982-85
* Please check and match the part number of your relay in your car before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94461511303
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
Shop Securely
12 Month Warranty
Worldwide Delivery
Porsche HVAC Relays, Sensors & Resistors | Precision Climate Control & System Reliability
Relays, sensors, and resistors are vital components in your Porsche’s heating and air conditioning system. They ensure the correct operation of fans, blowers, and temperature control systems by managing electrical flow, monitoring environmental conditions, and regulating motor speeds. A properly functioning electrical control system ensures reliable, efficient, and responsive climate control performance.
At Design911, we supply premium relays, sensors, and resistors engineered to meet or exceed original performance specifications. Built with high-quality materials and advanced circuitry, these components provide dependable electrical performance and long service life, ensuring your Porsche’s HVAC system operates as smoothly as intended.
Whether you’re diagnosing inconsistent airflow, fan speed issues, or erratic temperature readings, our range of Porsche HVAC relays, sensors, and resistors delivers precise performance, compatibility, and durability.
What Do HVAC Relays, Sensors & Resistors Do?
These components work together to regulate the electrical and mechanical functions of the climate control system.
Core Functions:
- Relays:
Control power to components like blower motors and compressors.
- Sensors:
Monitor temperature, pressure, and humidity for automatic climate
adjustment.
- Resistors:
Regulate fan speeds and motor operation.
- Maintain efficient, stable heating and cooling performance.
- Protect sensitive electrical components from overloads.
Without functioning relays, sensors, or resistors, the HVAC system may deliver erratic airflow, inaccurate temperatures, or fail to operate entirely.
Why Do HVAC Relays, Sensors & Resistors Fail or Malfunction?
Electrical components endure constant voltage changes, heat cycles, and vibration — all of which can lead to degradation over time.
Common Causes of Failure Include:
- Corrosion or oxidation on terminals and connectors.
- Overheating or short circuits caused by electrical surges.
- Moisture ingress or condensation.
- Burnt-out resistors due to high current load.
- Age-related sensor drift or internal failure.
When these components fail, you may notice intermittent fan
operation, incorrect cabin temperature readings, or total loss of heating and
cooling functionality.
Why Replace Your Porsche HVAC Relays, Sensors & Resistors?
Replacing worn or faulty electrical components restores climate control accuracy and ensures your HVAC system functions efficiently and safely.
Key Benefits:
- Restores proper temperature regulation and fan control.
- Prevents electrical faults and inconsistent airflow.
- Improves reliability and system efficiency.
- Ensures accurate sensor readings for stable operation.
- Compatible with Porsche 911, Boxster, Cayman, Panamera, Macan, Cayenne, and classic models.
- Ideal for diagnostics, maintenance, and complete system refurbishments.
Replacing these components during HVAC servicing helps prevent secondary issues like burnt connectors, blown fuses, or motor failure.
Highlights
- Precision-engineered Porsche HVAC relays, sensors, and resistors.
- Designed for accuracy, reliability, and thermal efficiency.
- Durable, corrosion-resistant materials for long service life.
- Direct-fit replacements for all Porsche climate systems.
- Essential for consistent heating, cooling, and fan control.
- Suitable for repairs, restorations, and system upgrades.
