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CARRIER Rollout Switch HH18HA449 - Replacement HVACR Controls, Switches & Thermostats
CARRIERReplacement HVACR Controls, Switches & Thermostats

CARRIER Rollout Switch HH18HA449

CARRIER Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Rollout Switch.

SKU 3G-OTH-81693

Brand
CARRIER
Item
Rollout Switch HH18HA449
Part Number
HH18HA449
Category
Replacement HVACR Controls, Switches & Thermostats
Available to Order
Also known as:HH18HA449CARRIER
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

CARRIER
Manufacturer Part Number
HH18HA449
Product Type
Rollout Switch

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: Rollout Switch.

Frequently Asked Questions

What is a Carrier rollout switch used for?

A Carrier rollout switch is a safety device that monitors burner flame rollout in gas-fired HVAC equipment. It shuts down the system if flames escape the combustion chamber, preventing fire hazards and equipment damage. This HH18HA449 model is a direct replacement for Carrier furnaces and boilers.

What are the specifications of the Carrier HH18HA449 rollout switch?

The Carrier HH18HA449 is a rollout switch with manufacturer part number HH18HA449. It is designed as a replacement HVACR control for Carrier gas-fired systems. The switch interrupts power to the gas valve when abnormal flame rollout is detected, ensuring safe operation.

Where to buy Carrier HH18HA449 rollout switch worldwide?

You can source the Carrier HH18HA449 rollout switch through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this replacement part.

How to install a Carrier rollout switch?

To install a Carrier rollout switch, first disconnect power and gas supply. Remove the old switch, noting wire connections. Mount the new HH18HA449 switch in the same location, reconnect wires per the wiring diagram, and restore power. Test for proper operation before returning the system to service.

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.
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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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