Description
Carrier HH18HV125 Automatic Limit Switch Overview
The Carrier HH18HV125 is a genuine OEM automatic limit switch designed to protect furnaces and heating systems from dangerous overtemperature conditions. With an operating range of 95°F to 125°F, this limit switch automatically resets once temperatures return to a safe level, minimizing system downtime and the need for manual intervention.
Key Features
- Genuine Carrier OEM replacement part — ensures proper fit and reliable performance
- Automatic reset operation — restores system function once safe temperatures are reached without manual reset
- Operating temperature range: 95°F to 125°F
- Designed to interrupt furnace operation upon detecting overtemperature conditions, protecting heat exchangers and system components
- Direct replacement for compatible Carrier furnace models
How It Works
The limit switch continuously monitors the temperature within the furnace plenum or heat exchanger area. If temperatures exceed the upper threshold of 125°F, the switch opens the circuit, shutting down the burner or blower to prevent equipment damage or fire hazard. Once the temperature drops back within the safe range, the automatic reset feature closes the circuit and allows normal operation to resume.
Application
- Carrier residential and light commercial furnaces
- Replacement of failed or out-of-specification limit switches
- Routine preventive maintenance and system servicing
Why Choose Genuine OEM Parts
Using genuine Carrier replacement parts like the HH18HV125 ensures compatibility, maintains manufacturer warranty compliance, and delivers the reliability your customers expect. Avoid callbacks and comebacks by installing the right part the first time.
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