AC Air Conditioner Expansion Valve Solenoid (CCS1) for 2017-2023 Tesla Model 3 |

1. Key Specifications & Compatibility

2. Why This Brand-Grade CCS1 Solenoid Is Critical for Your Model 3

1. Precise Refrigerant Flow Control: Unlike generic solenoids with fixed on/off logic, this CCS1 solenoid responds to real-time signals from the AC control module (e.g., cabin temperature setpoint, battery heat status) to adjust valve opening. Too little refrigerant causes weak cooling; too much leads to evaporator freezing—this solenoid avoids both issues with 0.1% precision in flow regulation.
2. Supports Battery Thermal Management: Model 3’s AC system shares refrigerant with the battery cooling circuit; the CCS1 solenoid coordinates refrigerant distribution to prioritize battery temperature control (e.g., reducing AC load to cool the battery during fast charging). A faulty solenoid disrupts this coordination, leading to slow charging or battery overheating warnings.
3. Leak-Proof & Durable: The reinforced EPDM seals and corrosion-resistant coil housing prevent refrigerant leakage (a common issue with generic solenoids using low-grade rubber seals) and coil rust (from under-hood moisture). Leaked refrigerant not only breaks cooling but also increases environmental impact and AC compressor strain.
4. Seamless System Integration: The plug-and-play connector and PWM signal compatibility ensure the solenoid communicates perfectly with Model 3’s original AC control module—no “error codes” or “unrecognized component” issues that generic parts often trigger.

3. What It Actually Does (No Tech Jargon)

• Makes AC Cool On Demand: When you set the cabin temperature to 24℃, the CCS1 solenoid “tells” the expansion valve how much refrigerant to let into the evaporator (the part that cools air). If it’s too hot, it opens wider for more cooling; if it’s cold enough, it narrows to save energy—keeping the cabin at your desired temp.
• Helps Battery Stay Cool: During fast charging, your Model 3’s battery heats up. This solenoid coordinates with the thermal system to send extra refrigerant to cool the battery (without sacrificing too much cabin cooling)—so charging stays fast and the battery stays healthy.
• Won’t Leak or Fail in Extreme Weather: It works in -40℃ winter cold (so AC still heats properly via refrigerant cycle) and 130℃ under-hood heat (so it doesn’t shut down on hot days). The seals also keep refrigerant from leaking out—no more “AC gets weak over time” issues.
• Plugs Right In: It uses the same connector as your original solenoid—just unplug the old one, plug this in, and it works with your Model 3’s system immediately (no need to rewrite car software or cut wires).

4. Signs You Need to Replace This CCS1 Solenoid

• AC Blows Warm Air Intermittently: The AC cools for a few minutes, then stops (the solenoid can’t maintain stable valve opening, cutting off refrigerant flow).
• Cabin Temperature Fluctuates: Even with the AC set to a fixed temp, the cabin alternates between cold and warm (signals the solenoid is unresponsive to control module signals).
• Battery Overheating Warnings: During fast charging, the vehicle displays “Battery temperature too high” (the solenoid fails to redirect refrigerant to cool the battery).
• Refrigerant Leaks: You notice a sweet smell (refrigerant) from the vents, or the AC loses cooling capacity within weeks of recharging (seals are worn, causing leakage).
• AC Control Module Error Codes: A diagnostic scan shows codes related to “expansion valve control” or “solenoid circuit” (the vehicle detects the solenoid isn’t working properly).

5. Why This Brand-Grade Solenoid Outperforms Generic Alternatives

• Tesla-Spec PWM Compatibility: Generic solenoids only support basic voltage control, not Model 3’s PWM signal. This leads to “error codes” or unresponsive AC. Our solenoid matches the factory PWM protocol, ensuring seamless communication with the control module.
• R-1234yf Optimized Seals: Generic solenoids use seals designed for older R-134a refrigerant, which degrade quickly with R-1234yf (Model 3’s spec) and cause leaks. Our EPDM seals are R-1234yf-specific, lasting 5+ years.
• Battery Thermal Coordination: Generic solenoids ignore battery thermal signals, only focusing on AC cooling. Our solenoid supports the factory thermal management logic, helping the battery stay within optimal temperature ranges.
• Consistent Performance: Generic solenoids have inconsistent valve opening (e.g., 5% deviation from signal), leading to uneven cooling. Our brand-grade solenoid maintains ≤0.5% deviation, matching factory precision.

6. Installation & What You Receive

• 1x AC Expansion Valve Solenoid (CCS1 specification, for 2017–2023 Model 3)
• 2x Replacement EPDM seals (for the refrigerant interface; avoids reusing old, worn seals that cause leaks)
• 1x Dielectric grease packet (for the electrical connector; prevents corrosion and ensures stable signal transmission)
• Digital Installation Guide: Step-by-step instructions (with photos) tailored to Model 3, including:
  • Pre-installation note: The AC system must be professionally evacuated of refrigerant before removal (to comply with environmental regulations and avoid injury).
  • Disassembly steps: Locating the solenoid (mounted near the AC evaporator in the front cabin), disconnecting the electrical connector, and removing the old solenoid from the expansion valve body.
  • Installation steps: Installing new seals, securing the new solenoid, reconnecting the connector (with dielectric grease), and post-installation AC system recharging (requires professional equipment to ensure proper pressure).

7. After-Sales Support

• Warranty: Backed by a limited warranty. For detailed coverage terms (e.g., duration, eligible defects like leakage, signal unresponsiveness, or coil failure), please reach out to our team.
• Technical Assistance: Our EV specialists have hands-on experience with Model 3’s AC and thermal management systems—they’re available via email or chat to answer questions (e.g., “How to confirm compatibility with my 2020 Model 3” or “What diagnostic checks to run after installation”) and help you coordinate smoothly.

Company Profile

Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has established the independent brand "CheFuning". The Che Funing brand regards human resources as the foundation of the enterprise and attaches great importance to the construction of the talent team; The Che Funing brand regards product quality as the life of the enterprise, and every single product from screws to accident parts is carefully selected.

The CheFuning brand helps partners transform from traditional fuel vehicles to new energy vehicle models, expands from a single horizontal vulnerable parts operation to a new energy full vehicle parts channel enterprise, upgrades from regional chain stores to independent brands of new energy full vehicle series, standardizes the operation of independent brands in the new energy industry, and integrates resources to reduce costs and increase efficiency, occupying the commanding heights of enterprise management.