Relays / Sensors / Resistors
Fits:
Porsche 911 1974-88 (incl. Turbo)
* Please check and match the part number of your relay in your car before ordering.
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161510302
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1974-88 (incl. Turbo)
* 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Related, superseded, cross reference or alternative numbers for comparison.
91161510302
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Shop Securely
12 Month Warranty
Worldwide Delivery
Compressor mounted in the smugglers box on left hand drive cars and ahead of the fuel tank for right hand drive cars.
The Electrocooler electric air conditioning system for Porsche 911 is a revolutionary update for the complicated A/C and ventilation setup fitted to Porsche 911 models from 1974 to 1989.
The kit is a total redesign of the 911 A/C system, with additional improvements to the fresh air blower unit and warm air distribution. It transforms the experience of travelling in an aircooled Porsche 911.
• Weighs around 35lbs (16 kg)
• Fits in front luggage bay
• Lightweight narrow hose set weighing under 4lbs (1.5kg).
• Easy Install. Non-damaging bolt-in installation.
• Clutter Free. Uses the standard fresh air vents to deliver cool air.
• Simple to Use. Control by a single 'smart button'.
• Modern double cage Gen 2 blower.
• Energy Efficient. Uses less than 1 HP of engine power.
• Kits available to fit 911 from 1974 to 1989
This is a dual condenser system suitable for high heat (> 35 deg C) and humidity climates.
A double condenser installation is highly recommended for many hot and humid parts of the world, such as Florida or Singapore.
Second condenser can be installed in the left rear fender, ahead or behind the rear wheel. See back of install manual for details.
Please note
Our electric air conditioning likes a healthy current so we recommend upgrading the original alternator in the vast majority of installations.
All kits now include our Gen 2 Blower.
Complete HVAC kit for the Porsche 911 models 1974 to 1989.
The kit is a complete redesign of the 911 A/C system with notable improvements to the blower and heating distribution as well.
For Installation Guide CLICK HERE
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Shop Securely
12 Month Warranty
Worldwide Delivery
Compressor mounted in the smugglers box on left hand drive cars and ahead of the fuel tank for right hand drive cars.
The Electrocooler electric air conditioning system for Porsche 911 is a revolutionary update for the complicated A/C and ventilation setup fitted to Porsche 911 models from 1974 to 1989.
The kit is a total redesign of the 911 A/C system, with additional improvements to the fresh air blower unit and warm air distribution. It transforms the experience of travelling in an aircooled Porsche 911.
• Weighs around 30 lbs (14 kg)
• Fits in front luggage bay
• Lightweight narrow hose set weighing under 4lbs (1.5kg).
• Easy Install. Non-damaging bolt-in installation.
• Clutter Free. Uses the standard fresh air vents to deliver cool air.
• Simple to Use. Control by a single 'smart button'.
• Modern double cage Gen 2 blower.
• Energy Efficient. Uses less than 1 HP of engine power.
• Kits available to fit 911 from 1974 to 1989
This is a single condenser suitable for climates up to 35 deg C ambient and low humidity. For high heat and humidity climates we recommend our dual condenser system.
Please note
Our electric air conditioning likes a healthy current so we recommend upgrading the original alternator in the vast majority of installations.
All kits now include our Gen 2 Blower.
Complete HVAC kit for the Porsche 911 models 1974 to 1989.
The kit is a complete redesign of the 911 A/C system with notable improvements to the blower and heating distribution as well.
For Installation Guide CLICK HERE
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
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.
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Air con condensers & desiccators
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Air con evaporators & expansion valves
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Air con pipes
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Air con belts
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Fans & cowlings
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Compressors
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Heater flaps
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Blower Motors & Fans
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Heater blowers
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Heater hoses & pipes
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Heater cables
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Vents / Grilles
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Climate Control
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Temperature Sensors / Switches
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Heating / Air conditioning Housings
