Description
Product Overview
The PartCatalog Auxiliary Heater Relay is engineered as a direct replacement for original equipment, meeting OE specifications for performance and durability. Housed in a compact DIN‑rail‑mountable case, the relay utilizes a normally open contact design and three robust terminals. Its automatic operation mode ensures the auxiliary heater engages precisely when needed, providing dependable warmth in cold environments. Built to comply with OE standards, this relay delivers consistent electrical characteristics and long‑term reliability.
Usage
Designed for automotive applications, this relay is ideal for vehicles equipped with auxiliary heaters, especially in regions with harsh winters. Install the unit on a standard DIN rail within the engine compartment or under the dashboard, connecting to the heater circuit for automatic temperature regulation. Suitable for a wide range of makes and models listed in the fitment chart, it serves fleet operators, DIY enthusiasts, and professional mechanics seeking a hassle‑free upgrade.

Why Choose Us
PartCatalog guarantees that each relay undergoes rigorous testing to match or exceed the original manufacturer’s specifications. Our quality assurance process includes thermal cycling, vibration, and electrical load testing, ensuring the relay performs under extreme conditions. Backed by a comprehensive warranty and supported by detailed installation guides, you receive a product that combines OEM reliability with competitive pricing.
Key Features
- Direct OE replacement – fits without modifications
- Normally open contact for precise heater activation
- Three terminals simplify wiring and reduce installation time
- DIN‑rail mounting for secure, space‑efficient placement
- Automatic operation mode enhances vehicle comfort in cold weather
FAQ
Is this relay compatible with my vehicle?
Check the fitment chart in the product images; the relay matches the specifications of many makes and models that use a standard auxiliary heater circuit.
Can I install the relay myself?
Yes, the DIN‑rail design allows for a straightforward plug‑in installation. Follow the included wiring diagram for a secure connection.
What does “normally open” mean for this relay?
A normally open contact stays open until the control signal activates, ensuring the heater only runs when required, which improves energy efficiency and prevents unnecessary wear.
Does the relay meet OE quality standards?
Absolutely. It is manufactured to meet OE specifications, and each unit undergoes extensive testing for durability and performance.
What warranty does PartCatalog provide?
The relay comes with a one‑year limited warranty covering defects in materials and workmanship, giving you peace of mind after purchase.





Polaris Snowmobile Cover SBU Deluxe Canvas
Polaris 600 SWITCHBACK Snowmobile Cover SBU Brand
Carrier HVAC Automatic Relay 24V Normally Open
Reviews
There are no reviews yet.