Johnson Controls A19ABA-40C Remote Bulb Temperature Control, Cooling Only (-30 to 100F) Temperature Controller

The Johnson Controls A19ABA-40C Remote Bulb Temperature Control, Cooling Only (-30 to 100F) Temperature Controller is a Johnson Controls temperature controller for HVAC repair and replacement work. Use it when the part number A19ABA-40C and the listed specifications match the equipment being serviced.

Johnson Controls A19 Series temperature controls are designed to cover a broad range of uses for heating and general purpose requirements. Controls have SPST contacts which open on temperature increase or they may be supplied in single-pole, double-throw contact action. Various control ranges are available to cover working temperatures from -30 to 550 F (-34 to 288 C). Closed tank fittings and bulb wells are available for immersion applications. These controls are designed for open low and open high applications. Where critical or high value products are to be maintained within a specific temperature differential, a single control should

Key Specs

• Application: Cool Only, Remote Bulb Temperature
• Capillary Length: 6′
• Product Type: Temperature Controller

Expert Verdict

Reviewed by the SuperArbor Pro Desk: choose this part when the existing component label and unit documentation match A19ABA-40C and the spec set above. It is best suited for targeted HVAC service repairs where exact fitment matters more than broad universal compatibility.

FAQs

What is the Johnson Controls A19ABA-40C used for?

It is a temperature controller for compatible Johnson Controls HVAC equipment. Match the part number A19ABA-40C and the equipment service literature before ordering or installing.

Which specs should I verify before purchase?

Verify the spec set shown for this part: Application: Cool Only, Remote Bulb Temperature; Capillary Length: 6′; Product Type: Temperature Controller. The replacement should match the existing component and the unit documentation.

How do I confirm this is the right replacement?

Compare the part number A19ABA-40C, the temperature controller description, and any unit model references with the original component and the service manual.

Is this an OEM-style replacement part?

Use it as a direct replacement only when Johnson Controls documentation lists A19ABA-40C or an approved equivalent for the unit being serviced.

Who should install this HVAC component?

A qualified HVAC technician should install and test the temperature controller. Disconnect power first, follow lockout procedures, and confirm safe operation after replacement.

Safety and Installation Notes

Disconnect power before service. HVAC electrical and combustion-related components should be installed and tested by a qualified technician. After installation, confirm wiring, mounting, airflow or fluid routing as applicable, and normal system operation.