MARS 39320 Limit Switch 210–250°F Open Temp Rise 120/240V HVAC Furnace Control

SKU: 39230

Weight	1.5 lbs
Dimensions	8 × 8 × 8 in

$69.05

In stock — available to order.

Sold individually. Each quantity ordered is one unit. Kits are one complete kit; products sold by length use the stated length unit.

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$69.05	0%
5–9	$65.60	5%
10+	$62.15	10%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order.

Bulk quantity & quote

Quantity needed

Enter the total quantity you need. We will confirm availability and a quote before you order.

Need a firm ship date? Availability may include supplier stock. Confirm availability before ordering for time-sensitive work.

MARS 39320 Limit Switch 210–250°F Open Temp Rise 120/240V HVAC Furnace Control

Specifications & product details

Overview

The MARS 39230 Limit Switch is a dependable temperature control component designed for HVAC systems, including those fueled by propane and natural gas. It operates by opening at a specified temperature rise to protect equipment from overheating.

Key Specifications

Switching Action: Opens on temperature riseTemperature Range: 210°F open, 250°F closeVoltage Rating: 120V @ 14A / 240V @ 10A full load
Includes: Tab-to-screw terminal adapters for flexible wiringMount
Type: Universal snap-disc compatible with OEM and aftermarket installs
Use Case & Compatibility:This high-limit control switch is

ideal for

LP and natural gas furnace safety circuitsForced-air HVAC blower systemsFan limit controllers on unit heaters and mobile home furnaces
Applications requiring high-temperature trip protectionInstallation & Wiring:Compatible with a variety of OEM and retrofit systems. The switch comes with versatile terminal adapters and installs quickly with common tools.

Product details

Part / SKU	39230

Package includes

The switch comes with versatile terminal adapters and installs quickly with common tools.

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

Shipping & availability

Availability may include our inventory and supplier sources. Listed stock does not by itself confirm immediate dispatch. Ask us to confirm a ship date before ordering for time-sensitive work.

Shipping methods and charges appear at checkout where available. Freight, oversized and specially handled items may require a quote. See our Shipping Policy for processing periods, restrictions and delivery information.