1. NISSAN Controls & Control Units On Sale
  2. sku: 9306948850961731
  3. API TECH 14ZTKH

API SERVICE TECH 14ZTKH Control Relay A/c

fits make: Nissan. year: 1989–1990.

14ztkh Api Service Tech A/c Control Relay Fits Nissan 240sx 1989-1990

( Brand: Api Service Tech ), ( Manufacturer Part Number: 14ZTKH ), ( Part Type: Control ), ( Compatible Make/model: Nissan 240sx ), ( Compatible Years: 1990 1989 1991 90 89 91 ), ( Fitment Info: Service Tech 6 Blade Terminal; Brown; Square; Skirted ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review API SERVICE TECH A/c Control Relay Nissan fits 240SX 1989–1990

The **14ZTKH A/C Control Relay** is a precision-engineered electrical component designed specifically for the **Nissan 240SX (Z31) models from 1989 to 1990**, serving as a critical interface between the vehicle s air conditioning system and its power supply. This relay acts as a protective and control switch, ensuring that the A/C compressor engages smoothly while preventing electrical overloads, short circuits, or excessive current draw that could damage the system s wiring, fuses, or the compressor itself. Crafted with high-quality materials, the relay features a robust **SPDT (Single Pole Double Throw)** mechanism, allowing it to seamlessly route power from the vehicle s ignition or A/C switch to the compressor clutch coil when activated, while maintaining a secure disconnect when the system is off. Its compact yet durable design fits seamlessly into the 240SX s under-dash or engine bay relay bay, where it integrates with the existing wiring harness without requiring modifications. Beyond its primary function of controlling the compressor, this relay also helps extend the lifespan of the A/C system by mitigating voltage spikes and providing a clean, consistent power cycle, which is particularly beneficial in older vehicles prone to electrical wear. Whether replacing a failed original relay or upgrading for enhanced reliability, this aftermarket part ensures optimal performance, quiet operation, and long-term durability, making it an essential component for any 240SX owner seeking a seamless and efficient air conditioning experience.

### **Pros and Cons of buying a API Service 14ZTKH A/C Control Relay for a 1989-1990 Nissan 240SX**

#### **Pros:**

1. **Direct Fitment** The relay is specifically designed for the 1989-1990 Nissan 240SX, ensuring compatibility without modification.

2. **Reliability** API Service parts are known for quality control, reducing the risk of premature failure compared to aftermarket knockoffs.

3. **Easy Installation** Relays are straightforward to replace, typically requiring only basic tools and minimal wiring knowledge.

4. **Cost-Effective Fix** Replacing a faulty A/C control relay is far cheaper than diagnosing a broader electrical issue (e.g., faulty compressor clutch, fuse, or wiring).

5. **Prevents Further Damage** A failing relay can cause intermittent A/C operation, leading to compressor wear or electrical shorts if left unaddressed.

6. **Widely Available** As an OEM-style part, it can be found at auto parts stores, online marketplaces, or directly from API Service.

7. **Long Lifespan** A good-quality relay should last the lifespan of the vehicle if the electrical system is otherwise functional.

#### **Cons:**

1. **Potential Counterfeit Risk** Some sellers may offer fake or low-quality replicas, especially on third-party platforms. Always verify the seller s reputation.

2. **Mismatched Specifications** While designed for the 240SX, slight variations in pinout or voltage ratings could exist in rare cases, requiring double-checking against the vehicle s wiring diagram.

3. **No Warranty on Used/Refurbished Units** If purchasing from a used or refurbished source, there may be no return or replacement guarantee.

4. **Diagnostic Confusion** If the A/C issue persists after replacement, it may indicate a deeper problem (e.g., faulty compressor clutch, low refrigerant, or electrical shorts), requiring further troubleshooting.

5. **Limited Brand Recognition** Unlike major brands (e.g., Denso, Bosch), API Service may not have the same level of brand trust for some buyers, though it remains a reputable supplier.

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### **Conclusion**

The **API Service 14ZTKH A/C control relay** is a practical and cost-effective solution for fixing A/C control issues in a 1989-1990 Nissan 240SX. Its direct fitment, reliability, and ease of installation make it a strong choice for DIYers and mechanics alike. However, buyers should ensure they purchase from a trusted source to avoid counterfeit parts and verify compatibility with the vehicle s wiring before installation.

If the A/C problem persists after relay replacement, further diagnostics (e.g., checking the compressor clutch, fuses, or refrigerant levels) will be necessary to isolate the root cause.

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### **Recommendation**

- **Buy from a reputable seller** (e.g., official API Service distributors, trusted online retailers like RockAuto, or local auto parts stores with return policies).

- **Verify the part number and pinout** against the 240SX wiring diagram to confirm compatibility.

- **Test the relay** after installation by cycling the A/C switch and listening for proper engagement of the compressor clutch.

- **Consider a multimeter** if unsure about electrical issues this can help confirm if the relay is functioning or if other components are at fault.

For most cases, replacing the relay is a quick fix worth attempting before pursuing more complex repairs. If the issue is electrical in nature, a professional inspection may be advisable.

Details:

Mounting Bracket Included: No. Detailed Applications Years: Vehicle: 1989 - 1990 Nissan 240SX. Terminal Quantity: 6. API SERVICE TECH A/C Control Relay fits Nissan 240SX 1989 - 1990 14ZTKH: Brand: condition: New Notes: 6 Blade Terminal; Brown; Square; Skirted, Specifications Terminal Type.

Terminal Gender: Male. 12 Month Warranty.

part #: 14ztkh price

  • $40.75

specifications nssnheatcontrol:

  • for makes: Nissan
  • for years: 1989-1990
  • brand: Api Service Tech
  • mpn: 14ztkh
  • part type: Control
  • compatible make/model: Nissan 240sx
  • compatible years: 1990 1989 1991 90 89 91
  • fitment info: Service Tech 6 Blade Terminal; Brown; Square; Skirted
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

seller nssnheatcontrol:

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offer nssnheatcontrol:

  • quantity: 1
  • started: March 26, 2026
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  • Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units
for makes: nissan, for years: 1989-1990, part type: control, compatible make/model: nissan 240sx, compatible years: 1990 1989 1991 90 89 91, fitment info: service tech 6 blade terminal; brown; square; skirted, manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 9306948850961731,
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  • New. Offer #1 priced at $40.75 + $0.00 shipping estimate = $40.75* total. Product Specifications. 1989-1990 Nissan 240SX.FREE SHIPPING

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