Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

CARRIER Rollout Switch: Mfr Part # HH18HA452 - Replacement HVACR Controls, Switches & Thermostats
CARRIERReplacement HVACR Controls, Switches & Thermostats

CARRIER Rollout Switch: Mfr Part # HH18HA452

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

SKU 3G-OTH-79659

Brand
CARRIER
Item
Rollout Switch: Mfr Part # HH18HA452
Category
Replacement HVACR Controls, Switches & Thermostats
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
HH18HA452
Product Type
Limit Switch

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

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

Frequently Asked Questions

What is the CARRIER HH18HA452 rollout switch used for?

The CARRIER HH18HA452 rollout switch is a limit switch used in HVACR systems to detect overheating or flame rollout in gas-fired furnaces and boilers. It interrupts the burner circuit when unsafe temperatures occur, preventing equipment damage and fire hazards.

What are the specifications of the CARRIER HH18HA452 rollout switch?

The CARRIER HH18HA452 is a limit switch with manufacturer part number HH18HA452. It is designed as a replacement HVACR control for safety shutdown in gas-fired heating equipment. For detailed electrical ratings and temperature thresholds, consult the original equipment manual.

Where to buy the CARRIER HH18HA452 rollout switch worldwide?

3G Electric supplies the CARRIER HH18HA452 rollout switch worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the CARRIER HH18HA452 rollout switch?

To install the CARRIER HH18HA452 rollout switch, first disconnect power and gas supply. Mount the switch securely near the burner rollout area, then wire it in series with the burner circuit per the manufacturer's wiring diagram. Always test for proper operation after installation.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

More from CARRIER

View all CARRIER parts
Rectifier time delay control board for HVACR systems. Manages timing of electrical signals to sequence components such as compressors and fans. Used as a replacement part in commercial and industrial heating, ventilation, air conditioning, and refrigeration applications
CARRIER
Rectifier time delay control board for HVACR systems. Manages timing of electrical signals to sequence components such as compressors and fans. Used as a replacement part in commercial and industrial heating, ventilation, air conditioning, and refrigeration applications
The CARRIER HK38EA004 is a furnace control board that manages ignition sequencing, blower timing, and safety functions in gas furnaces. It serves as a direct replacement part for HVAC systems requiring this specific board to restore proper heating operation
CARRIER
The CARRIER HK38EA004 is a furnace control board that manages ignition sequencing, blower timing, and safety functions in gas furnaces. It serves as a direct replacement part for HVAC systems requiring this specific board to restore proper heating operation
This pressure switch monitors and controls refrigerant or air pressure in HVACR systems. It opens or closes electrical contacts at preset thresholds to protect compressors and other components. Suitable for use in commercial and residential HVAC applications
CARRIER
This pressure switch monitors and controls refrigerant or air pressure in HVACR systems. It opens or closes electrical contacts at preset thresholds to protect compressors and other components. Suitable for use in commercial and residential HVAC applications
Compressor diagnostic module for monitoring and diagnosing compressor performance in HVACR systems. Assists technicians in identifying electrical and mechanical faults to reduce troubleshooting time and prevent unnecessary compressor replacements
CARRIER
Compressor diagnostic module for monitoring and diagnosing compressor performance in HVACR systems. Assists technicians in identifying electrical and mechanical faults to reduce troubleshooting time and prevent unnecessary compressor replacements
Replacement furnace control board for managing ignition sequencing, blower timing, and limit circuit monitoring in gas furnaces. Direct replacement part for maintaining proper heating system operation
CARRIER
Replacement furnace control board for managing ignition sequencing, blower timing, and limit circuit monitoring in gas furnaces. Direct replacement part for maintaining proper heating system operation
Relay-phase monitor for HVACR equipment. Detects phase loss, phase reversal, and undervoltage conditions to protect compressors and motors from electrical faults. Suitable for commercial and industrial HVAC systems
CARRIER
Relay-phase monitor for HVACR equipment. Detects phase loss, phase reversal, and undervoltage conditions to protect compressors and motors from electrical faults. Suitable for commercial and industrial HVAC systems
Interface board for HVACR systems, used to manage communication between the main controller and peripheral devices. Enables signal routing and system integration in commercial heating, ventilation, air conditioning, and refrigeration applications
CARRIER
Interface board for HVACR systems, used to manage communication between the main controller and peripheral devices. Enables signal routing and system integration in commercial heating, ventilation, air conditioning, and refrigeration applications
Heater accessory limit switch for HVACR systems. Monitors temperature to prevent overheating in furnaces and air handlers. Interrupts power when temperature exceeds safe limits
CARRIER
Heater accessory limit switch for HVACR systems. Monitors temperature to prevent overheating in furnaces and air handlers. Interrupts power when temperature exceeds safe limits