HomeHVAC > RelaysStandard Ignition RY-1738 HVAC Automatic Temperature Control (ATC) Relay
Part #: RY-1738

Standard Ignition RY-1738 HVAC Automatic Temperature Control (ATC) Relay

⚙️ 7 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Fiat, 500
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Reliable HVAC Automatic Temperature Control Relay for Fiat 500

The Standard Ignition RY-1738 HVAC Automatic Temperature Control (ATC) Relay is designed specifically for the Fiat 500, ensuring precise control of your vehicle's climate system. This 12-volt relay supports a 20 amp rating and features a durable rectangular connector with four male blade terminals for secure and efficient electrical connections.

Key Features of Standard Ignition RY-1738 Relay

  • Amperage rating: 20 amps for reliable current handling
  • 12-volt operation compatible with Fiat 500 electrical systems
  • Four male blade terminals for secure and stable connections
  • Rectangular connector shape with four male connectors
  • Functions as an HVAC Automatic Temperature Control relay
  • No mounting brackets included for flexible installation options

Detailed Product Description

The Standard Ignition RY-1738 relay is engineered to meet the specific HVAC system requirements of the Fiat 500. Its 20 amp amperage rating supports the electrical load necessary for automatic temperature control functions, ensuring consistent climate regulation inside the vehicle. The relay’s four male blade terminals and rectangular connector provide a reliable interface with the vehicle’s wiring harness, minimizing the risk of connection failures. Operating at 12 volts, this relay integrates seamlessly with the Fiat 500’s electrical system, maintaining optimal performance of the HVAC controls.

Common Applications and Issues Addressed

  • Restores proper function to the HVAC automatic temperature control system
  • Resolves intermittent or complete failure of climate control relays
  • Eliminates issues with inconsistent heating or cooling in the Fiat 500
  • Prevents electrical faults caused by worn or damaged relay terminals
  • Supports stable operation of the vehicle’s HVAC blower and temperature regulation

Installation Notes and Tips

  • Ensure the vehicle ignition is off before beginning installation
  • Verify connector orientation matches the rectangular shape and terminal configuration
  • Check for corrosion or damage on mating connectors before installation
  • Securely seat the relay to avoid loose electrical connections
  • Consult the Fiat 500 service manual for specific HVAC relay location and wiring diagrams

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet or exceed OEM specifications, providing dependable performance for your Fiat 500 HVAC system. The RY-1738 relay undergoes rigorous testing to ensure durability and electrical reliability. Please refer to Standard Ignition’s warranty policy for coverage details on this HVAC Automatic Temperature Control relay.

BrandStandard Ignition
Part NumberRY-1738
Amperage Rating20 A
Connector GenderMale
Connector ShapeRectangular
FunctionsRelay
Mounting Bracket(s) IncludedNo
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 7 vehicles. Search below:

YearMakeModelPositionNotes
2018Fiat500N/A
2017Fiat500N/A
2016Fiat500N/A
2015Fiat500N/A
2014Fiat500N/A
2013Fiat500N/A
2012Fiat500N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

160791R248256-269768125507AAAR7242R7241RAA2721

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.