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CARRIER Auto Limit Switch: Mfr Part # HH18HA499 - Replacement HVACR Controls, Switches & Thermostats
CARRIERReplacement HVACR Controls, Switches & Thermostats

CARRIER Auto Limit Switch: Mfr Part # HH18HA499

CARRIER Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Limit Control.

SKU 3G-OTH-79492

Brand
CARRIER
Item
Auto Limit Switch: Mfr Part # HH18HA499
Category
Replacement HVACR Controls, Switches & Thermostats
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

CARRIER
Manufacturer Part Number
HH18HA499
Product Type
Limit Control

Technical Documents

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CARRIER Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

CARRIER Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Limit Control.

Frequently Asked Questions

What is the CARRIER HH18HA499 auto limit switch used for?

The CARRIER HH18HA499 auto limit switch is a replacement HVACR control used to monitor and limit temperature in heating systems. It automatically shuts down the burner or fan if temperatures exceed safe levels, protecting equipment and preventing overheating in residential and commercial furnaces.

What are the specifications of the CARRIER HH18HA499 limit switch?

The CARRIER HH18HA499 is a limit control with manufacturer part number HH18HA499. It is designed as a direct replacement for Carrier HVAC systems. For exact electrical ratings and temperature settings, consult the original equipment manual or contact 3G Electric for technical support.

Where to buy the CARRIER HH18HA499 limit switch worldwide?

You can source the CARRIER HH18HA499 limit switch through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact our team for pricing and lead time on this replacement HVACR control.

How to install the CARRIER HH18HA499 auto limit switch?

To install the CARRIER HH18HA499, first disconnect power to the HVAC system. Remove the old limit switch and note wiring connections. Mount the new switch in the same location, reconnect wires per the wiring diagram, and restore power. Always follow local electrical codes and the manufacturer's instructions.

Used in

Common applications for CARRIER
Commercial rooftop HVAC maintenance — Carrier heat exchanger kit 48GS660004 for replacing failed heat exchangers in packaged units.
Refrigeration system servicing — Carrier synthetic oil P903-2301 for lubricating compressors in HFC-based commercial refrigeration.
HVAC control system repair — Carrier blower control board HH84AA017 for restoring fan operation in air handlers.
Gas furnace safety inspection — Carrier rollout switch HH18HA449 for replacing faulty safety switches in heating systems.
Condenser unit overhaul — Carrier condenser fan blade 30GX660017 for replacing damaged blades in outdoor condensing units.
Compressor protection — Carrier crankcase heater HT31AZ121 for preventing liquid slugging in compressors during off-cycles.

CARRIER Products

3G Electric supplies CARRIER replacement hvacr controls, switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
CARRIER Auto Limit Switch: Mfr Part # HH18HA138
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CARRIER Auto Limit Switch: Mfr Part # HH18HA138
CARRIER Limit Switch: Mfr Part # HH18HA416
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CARRIER Limit Switch: Mfr Part # HH18HA416
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CARRIER Auto Limit Switch: Mfr Part # HH12ZB250
CARRIER Limit Switch: Mfr Part # HH12ZB220
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