FOUR SEASONS 39WJHWTB Control Relay A/c

( Brand: Four Seasons ), ( Manufacturer Part Number: 39WJHWTB ), ( Part Type: Control ), ( Compatible Make/model: Chevrolet S10 Blazer ), ( Compatible Years: 1988 1983 1984 1985 1986 1987 1989 1990 1991 1992 1993 1994 88 83 ), ( Fitment Info: A/c Compressor Control Relay ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review FOUR SEASONS A/c Control Relay Chevy fits BLAZER S10 1983–1994

The **Seasons 39WJHWTB A/C Control Relay** is a high-quality, direct-fit replacement relay designed specifically for the **1983 1994 Chevrolet S10 and GMC Blazer** models, ensuring seamless integration with your vehicle s climate control system. Engineered to meet or exceed OEM specifications, this relay is built with durable materials to withstand the demands of frequent engagement, providing reliable performance in both cold and hot climates. The compact yet robust design ensures a secure fit within the vehicle s under-dash or engine bay relay housing, eliminating the risk of loose connections or premature failure. This relay plays a critical role in the air conditioning system by controlling the high-pressure side of the compressor clutch, allowing the A/C to engage and disengage as needed for optimal cooling efficiency. Whether you re dealing with a faulty original relay causing intermittent A/C operation or simply looking to upgrade for added longevity, this replacement offers a precise match to the factory unit, complete with the correct pin configuration and wiring connections. Its corrosion-resistant contacts prevent arcing and ensure consistent electrical flow, reducing the likelihood of system malfunctions or unexpected shutdowns. Ideal for DIY enthusiasts and professional mechanics alike, this relay is a straightforward, cost-effective solution to restore your vehicle s air conditioning functionality without compromising on performance or compatibility. Perfect for restoring vintage trucks and SUVs to their original driving comfort, this part is a must-have for anyone maintaining or restoring a classic Chevy S10 or Blazer.

### Pros and Cons of buying a **Seasons 39WJHWTB A/C Control Relay for Chevy S10/Blazer (1983 1994)**

1. **Direct Fitment** The relay is specifically designed for the 1983 1994 Chevy S10 and Blazer models, ensuring compatibility without modifications. This reduces the risk of installation errors and ensures proper function with the vehicle s wiring and control system.

2. **Reliability** A high-quality relay like this one from **Seasons** is built to handle the electrical demands of the A/C system, reducing the likelihood of frequent failures or short circuits. This can prevent unexpected breakdowns, especially during hot weather when the A/C is heavily relied upon.

3. **Easy Installation** Relays are typically straightforward to replace, requiring minimal tools and time. The wiring is usually color-coded or labeled, making it easier for even less experienced DIYers to swap out the old relay without professional help.

4. **Cost-Effective Fix** Replacing a faulty A/C relay is significantly cheaper than repairing or replacing other components in the A/C system, such as the compressor clutch, condenser, or control module. This makes it a budget-friendly solution for diagnosing A/C issues.

5. **Prevents Further Damage** A bad relay can cause intermittent or complete failure of the A/C system, which may lead to strain on other parts (e.g., the compressor or fuse block). Replacing it early can prevent more extensive and costly repairs down the line.

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

7. **Improved A/C Performance** If the original relay was failing intermittently, replacing it with a new one can restore consistent A/C operation, ensuring the system cools the cabin effectively when needed.

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1. **Potential Counterfeit or Low-Quality Units** While **Seasons** is a reputable brand, there is always a risk of purchasing a counterfeit or substandard relay, especially if buying from third-party sellers (e.g., eBay, Amazon, or untrusted online marketplaces). This could result in early failure or poor performance.

2. **Misdiagnosis of the Issue** If the A/C system has other underlying problems (e.g., a faulty compressor clutch, low refrigerant, or a blown fuse), replacing just the relay may not resolve the issue. This could lead to frustration if the problem persists after installation.

3. **Electrical System Sensitivity** Relays are part of the vehicle s electrical network, and improper handling during installation (e.g., bent pins, loose connections, or incorrect wiring) can cause short circuits or damage to other components. This requires careful attention to detail.

4. **Limited Lifespan** While relays are durable, they are not designed to last indefinitely. Over time, they may wear out, especially if the vehicle is frequently driven in extreme conditions (e.g., high humidity, frequent A/C use). Regular inspection is recommended.

5. **Compatibility Concerns** Although the relay is advertised for your specific models, slight variations in wiring or relay pin configurations between years or trims could cause issues. Always verify the relay s pinout or consult a wiring diagram before installation.

6. **No Guarantee of Original Functionality** If the original relay was damaged by a power surge, corrosion, or physical stress, replacing it with a new one may not fully restore the system s original performance, especially if other components are degraded.

7. **DIY Risk for Inexperienced Users** While relay replacement is simple, mistakes can occur if the installer is unfamiliar with the vehicle s electrical system. This could lead to further complications or safety hazards (e.g., shorting wires).

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The **Seasons 39WJHWTB A/C Control Relay** is a **strong, cost-effective solution** for diagnosing and fixing A/C control issues in your 1983 1994 Chevy S10 or Blazer. Its direct fitment, reliability, and ease of installation make it a practical choice for most owners. However, it is not a universal fix other components (e.g., fuses, compressor clutch, or wiring) may need attention if the A/C system continues to malfunction after replacement.

- **Purchase from a trusted source** (e.g., official dealers, reputable online retailers, or authorized distributors) to avoid counterfeit parts.

- **Verify the relay s pinout** against your vehicle s wiring diagram to ensure correct installation.

- **Inspect other related components** (fuses, connections, and the compressor clutch) if the A/C system still doesn t work properly after replacement.

- **Follow proper installation procedures** to avoid electrical issues.

If you are confident in your mechanical skills and the relay is the likely culprit (e.g., the A/C clicks but doesn t engage, or the system is intermittent), replacing it is a **worthwhile and low-risk upgrade**. However, if the problem persists or you suspect deeper issues, consult a professional mechanic to diagnose the root cause.

- You suspect a faulty relay is causing your A/C control issues.

- You are comfortable with basic electrical work or have access to guidance.

- You purchase it from a verified seller to ensure authenticity.

- You are unsure whether the relay is the actual problem (test it with a multimeter or seek professional diagnosis first).

- You are not confident in your ability to install it correctly.

- The A/C system has other obvious issues (e.g., no refrigerant, damaged compressor clutch).

**Final Verdict:** This relay is a **solid choice for a targeted fix**, but it should be part of a broader diagnostic process to ensure the A/C system functions as intended. For most owners, the cost and effort are justified if the relay is the likely culprit.

Details:

Color: Black. Product Specifications Amperage Rating: 20. Standard Relay. Vehicle specific applications.

Detailed Applications Years: Vehicle: Fitment Notes: 4 Blade Term. 1983 - 1984 Chevrolet S10 Blazer. Four Seasons A/C Control Relay fits Chevy S10 Blazer 1983 - 1994 39WJHWTB: Brand: condition: New Notes: Compressor Relay, Features:OE molded connectors. Quality contacts ensure proper conductivity.

Precision engineered.

part #: 39wjhwtb price

• $36.08

specifications chvyacheatercontrols:

• for models: S10, Blazer
• for makes: Chevy
• for years: 1983-1994
• brand: Four Seasons
• mpn: 39wjhwtb
• part type: Control
• compatible make/model: Chevrolet S10 Blazer
• compatible years: 1988 1983 1984 1985 1986 1987 1989 1990 1991 1992 1993 1994 88 83
• fitment info: A/c Compressor Control Relay
• manufacturer warranty: 12 Month Warranty
• attention: Read Full Description To Confirm Fitment
• cs-sku: 400

returns chvyacheatercontrols:

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

payments chvyacheatercontrols:

• credit card: Mastercard
• wallet: Google-pay
• other

offer chvyacheatercontrols:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: April 4, 2026

seller chvyacheatercontrols:

• # reviews: 23754
• city: New Bedford, Massachusetts
• rating: 99.1%

shipping chvyacheatercontrols:

• class: Economy
• service: Economy
• cost: $0.00
• type: Fixed
• transit: 5-10 Days

general chvyacheatercontrols:

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

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