FOUR SEASONS 36YWCNB21 Control Relay A/c

( Brand: Four Seasons ), ( Manufacturer Part Number: 36YWCNB21 ), ( Type: A/c Control Relay ), ( Fits 1: 1985 Nissan Sentra ), ( Fit Note: A/c Compressor Control Relay ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review FOUR SEASONS A/c Control Relay Nissan fits SENTRA 1985

The **Seasons 36YWCNB21 A/C Control Relay for Nissan Sentra (1985)** is a high-quality, direct-fit replacement relay designed specifically to restore optimal functionality to the air conditioning and climate control systems in your 1985 Nissan Sentra. Engineered to meet or exceed OEM specifications, this relay is built with durable, corrosion-resistant materials to ensure long-lasting performance and reliability, even in demanding driving conditions. The 36YWCNB21 relay features a robust internal spring mechanism and precision-molded contacts that guarantee smooth electrical engagement, reducing the risk of intermittent failures or premature wear. Whether your vehicle s A/C system has been experiencing erratic operation, complete shutdowns, or inconsistent cooling performance, this relay serves as a critical component in maintaining seamless operation of the climate control circuit. Its compact yet sturdy design ensures a perfect fit within the vehicle s wiring harness, eliminating the need for modifications or additional adapters. Ideal for both professional mechanics and DIY enthusiasts, this relay is a straightforward, cost-effective solution to diagnose and resolve common electrical issues that disrupt the comfort and efficiency of your Sentra s cabin environment. With its reliable performance and compatibility with the 1985 model year, the Seasons 36YWCNB21 relay helps restore confidence in your vehicle s climate control system, ensuring consistent cooling and heating performance year-round.

### **Pros and Cons of buying a "Seasons 36YWCNB21 A/C Control Relay for Nissan Sentra (1985)"**

1. **Compatibility** This relay is specifically designed for the 1985 Nissan Sentra, ensuring a direct fit without modification. This reduces the risk of electrical or mechanical incompatibility issues that generic parts might cause.

2. **Reliability** A high-quality relay like this one from a reputable brand (Seasons) is built to handle the electrical load of the A/C system reliably. It minimizes the risk of intermittent failures, which can be frustrating and costly if they occur frequently.

3. **Easy Installation** Relays are straightforward to replace, typically requiring only basic tools (screwdriver, wire connectors, and possibly a multimeter for testing). No major disassembly of the vehicle is usually needed, saving time and labor costs.

4. **Prevents A/C Failure** A faulty A/C relay can cause the air conditioning system to fail to engage, overheat, or behave erratically. Replacing it with a known-good unit restores proper function, improving comfort and preventing further damage to the system.

5. **Cost-Effective** Relays are inexpensive compared to the potential cost of diagnosing and repairing other components (like the A/C compressor clutch or control module) that may fail due to a bad relay. This makes it a low-risk, high-reward repair.

6. **Long Lifespan** If the relay is of good quality, it can last for years without issues, reducing the need for future replacements. This is especially beneficial in older vehicles where electrical components tend to degrade over time.

7. **Warranty Coverage** Many aftermarket parts, including this relay, come with warranties (e.g., 1 2 years). This provides peace of mind in case the relay fails prematurely due to defects.

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1. **Potential Counterfeit or Low-Quality Units** While Seasons is a well-known brand, there is always a risk of purchasing a counterfeit or substandard relay, especially if buying from untrusted sellers (e.g., unverified online marketplaces). This could lead to early failure or poor performance.

2. **Incorrect Pin Configuration** Even if the relay is compatible, wiring errors can occur if the pinout does not match the vehicle s harness. This requires careful verification or testing to ensure proper installation.

3. **No Guarantee of Underlying Issues** If the A/C system has other problems (e.g., a faulty compressor clutch, low refrigerant, or a bad fuse), replacing just the relay may not fully resolve the issue. Additional diagnostics may be needed.

4. **Limited Availability of Original Equipment (OEM) Parts** While this relay works, OEM relays (if available) might offer slightly better durability or exact compatibility. However, OEM parts are often more expensive and harder to find for older vehicles.

5. **Testing Required** After replacement, you may need to test the relay to confirm it s functioning correctly. This could involve checking for proper voltage at the relay pins or cycling the A/C to ensure it engages as expected.

6. **Risk of Overheating or Short Circuits** If the relay is installed incorrectly or the wiring is damaged, it could overheat or cause short circuits, potentially damaging other components in the system.

7. **No Free Replacement for Wear-and-Tear** Unlike some OEM parts, aftermarket relays are not typically covered under warranty for normal wear and tear (e.g., contact erosion over time). This means you may need to replace it again if it fails due to age.

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The **Seasons 36YWCNB21 A/C Control Relay for the 1985 Nissan Sentra** is a practical and cost-effective solution for restoring A/C functionality in your vehicle. Its direct compatibility, reliability, and ease of installation make it a strong choice for DIYers or mechanics. However, it s important to source it from a trusted seller to avoid counterfeit or low-quality units. Additionally, ensure proper installation and test the relay post-replacement to confirm it resolves the issue.

If the A/C system continues to malfunction after replacing the relay, further diagnostics (e.g., checking the compressor clutch, fuses, or control module) may be necessary. In such cases, consulting a professional or using an OEM relay could be worthwhile.

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- **Buy from a reputable seller** (e.g., Amazon, RockAuto, or a trusted auto parts store) to ensure authenticity and quality.

- **Verify pin configuration** before installation to avoid wiring mistakes.

- **Test the relay** after replacement by cycling the A/C and checking for proper engagement.

- **Consider OEM if available** only if budget allows, as aftermarket relays are usually sufficient for most users.

- **Combine with other diagnostics** if the issue persists, as the problem may extend beyond the relay.

**Final Verdict:** This relay is a **good choice** for most users, offering a balance of affordability, reliability, and ease of use. Proceed with installation only after confirming compatibility and sourcing the part from a trusted supplier.

Details:

12 Month Warranty. Detailed Applications Vehicle, 1985 Nissan Sentra. OE molded connectors. Quality contacts ensure proper conductivity.

Precision engineered. Product Specifications Amperage Rating:22. A/C Control Relay 36YWCNB21 for Nissan Sentra 1985: Brand: Four Seasons condition: New, Notes Compressor Features: Vehicle specific applications.

part #: 36ywcnb21 price

• $30.17

specifications nssnheatcontrol:

• for models: Sentra
• for makes: Nissan
• brand: Four Seasons
• mpn: 36ywcnb21
• type: A/c Control Relay
• fits 1: 1985 Nissan Sentra
• fit note: A/c Compressor Control Relay
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

offer nssnheatcontrol:

• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: May 7, 2026

shipping nssnheatcontrol:

• class: Standard
• transit: 2-6 Days
• cost: $0.00
• service: Standard
• type: Fixed

seller nssnheatcontrol:

• # reviews: 57818
• city: Coppell, Texas
• rating: 97.1%

payments nssnheatcontrol:

• wallet: Paypal
• other
• credit card: Diners-club

general nssnheatcontrol:

• condition: New
• Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units

returns nssnheatcontrol:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

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