Description
Product Overview
The JUSTTOP AC high pressure switch is engineered to monitor the refrigerant pressure within automotive air‑conditioning systems. Featuring a robust aluminum housing combined with precision‑molded plastic internals, the switch delivers accurate pressure readings and reliable activation of the compressor safety circuit. Its compact dimensions (2.68 x 1.38 x 1.34 inches) and lightweight design (1.76 ounces) make it an ideal direct‑fit replacement for OEM part number 1551343 and equivalent numbers such as 15-51343 and 13587668. The unit operates as a high‑pressure sensor, protecting the system from over‑pressurization while ensuring consistent cooling performance.
Usage
Designed for use in passenger cars, light trucks and SUVs, this pressure switch is suitable for models from Buick, Chevrolet, GMC, Pontiac, Saturn, Isuzu and other compatible makes. Install the switch in the AC high‑pressure line to continuously monitor system pressure during normal driving conditions, idling, and extreme temperature environments. It is especially valuable for technicians performing compressor replacements, system recharges, or diagnostic troubleshooting of HVAC faults. 
Why Choose Us
JUSTTOP commits to automotive quality standards, using premium aluminum that resists corrosion and high‑temperature deformation. Each sensor undergoes rigorous functional testing to meet or exceed OEM specifications, guaranteeing a perfect fit and reliable operation. Our products are backed by a responsive customer support team and a clear warranty, giving you confidence in long‑term performance and peace of mind for every repair.
Key Features
- High‑pressure monitoring ensures compressor protection and system stability
- Durable aluminum housing with precision‑molded plastic internals
- Direct OEM fit for part numbers 1551343, 15‑51343, 13587668
- Compatible with a wide range of Buick, Chevrolet, GMC and related models
- Easy installation with clean electrical connections for reliable operation
FAQ
Is this switch a high‑pressure or low‑pressure sensor?
This model is specifically a high‑pressure sensor designed to protect the AC compressor from excessive refrigerant pressure.
Which vehicle models are compatible?
The switch fits many Buick, Chevrolet, GMC, Pontiac, Saturn and Isuzu vehicles. Verify the year, make and model against the listed interchangeable part numbers before purchase.
What materials are used in construction?
The housing is made of high‑quality aluminum, while the internal components use engineered plastic for stability and resistance to vibration.
How do I ensure proper installation?
Before connecting, make sure the electrical contacts are clean and free of moisture or debris. Follow the wiring diagram and secure the switch firmly in the high‑pressure line.
Does the product come with a warranty?
Yes, JUSTTOP provides a standard warranty covering manufacturing defects, offering replacement or refund if the switch fails under normal use conditions.
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