CoolGuard® FS3 Drain Pan Float Switch, 24VAC Condensate Overflow Safety Switch for HVAC Systems

Product Description

CoolGuard® FS3 Drain Pan Float Switch

Protect Your HVAC System from Costly Water Damage

Water damage caused by clogged condensate drains can quickly lead to expensive repairs, ceiling damage, mold growth, and HVAC system failures. The CoolGuard® FS3 Drain Pan Float Switch provides dependable overflow protection by automatically shutting down your heating and cooling equipment before condensate can overflow from the drain pan.

Designed for both residential and light commercial HVAC systems, the FS3 continuously monitors water levels inside the condensate drain pan. If a clogged drain causes water to rise, the integrated float activates and interrupts the 24VAC control circuit, immediately shutting down the HVAC system until the issue is corrected.

The heavy-duty steel mounting bracket allows secure installation on primary or auxiliary drain pans, while the adjustable design accommodates off-center installations for added installation flexibility.

Compatible with 24VAC Class 2 thermostat circuits and rated for 1.25 amps, the CoolGuard FS3 is an easy, inexpensive upgrade that can help prevent thousands of dollars in water damage.

 

Key Features

• Automatically detects condensate overflow
• Shuts down HVAC equipment before overflow occurs
• Protects ceilings and HVAC equipment
• Heavy-duty steel mounting bracket
• Fits primary drain pans
• Fits auxiliary drain pans
• Supports off-center installations
• 24VAC Class 2 compatible
• 1.25 Amp rating
• Fast installation
• Reliable overflow protection
• Compact design

 

Technical Specifications

Specification	Value
Brand	CoolGuard
Model	FS3
Voltage	24 VAC
Current Rating	1.25 Amps
Circuit Type	Class 2 Thermostat Circuit
Height	8 in
Width	1.5 in
Depth	5.75 in
Weight	1 lb
Color	White

 

Perfect For

• Air Handlers
• Furnace Evaporator Coils
• Heat Pumps
• Air Conditioners
• Mini Split Air Handlers with Drain Pans
• Residential HVAC
• Commercial HVAC
• New Installations
• Replacement Safety Switches

 

Benefits

✅ Prevents costly water damage

✅ Detects clogged condensate drains

✅ Automatically shuts off HVAC equipment

✅ Protects ceilings and flooring

✅ Easy installation

✅ Heavy-duty mounting bracket

✅ Fits primary and auxiliary drain pans

✅ Compatible with most 24VAC HVAC systems

 

What’s Included

• CoolGuard FS3 Drain Pan Float Switch
• Heavy-Duty Steel Mounting Bracket
• Installation Hardware
• Installation Instructions

 

Frequently Asked Questions about the CoolGuard® FS3 Drain Pan Float Switch.

What does the CoolGuard FS3 Float Switch do?

The FS3 detects rising condensate water caused by a clogged drain line and automatically shuts down the HVAC system before the drain pan overflows.

 

How does a float switch prevent water damage?

As water rises inside the drain pan, the float activates and interrupts the 24VAC thermostat circuit, shutting off the air conditioner until the blockage is cleared.

 

Can this be installed on an auxiliary drain pan?

Yes. The FS3 is designed for installation on both primary and auxiliary condensate drain pans.

 

Does it work with off-center drain pan installations?

Yes. The adjustable mounting design allows installation even when the drain pan is not perfectly centered.

 

What voltage does the FS3 operate on?

The switch operates on 24VAC Class 2 thermostat circuits.

 

Is this compatible with most HVAC systems?

Yes. It works with most residential and light commercial HVAC systems that utilize a standard 24VAC control circuit.

 

Why should I install a drain pan float switch?

A float switch helps prevent expensive ceiling damage, drywall repairs, mold growth, and HVAC equipment damage caused by clogged condensate drains.

 

Is installation difficult?

No. The heavy-duty mounting bracket allows for a quick and secure installation on most drain pans.

 

Why Buy From MRCOOL DIRECT?

 

Protect your HVAC investment with genuine CoolGuard accessories from MRCOOL DIRECT. We offer fast shipping, competitive pricing, expert support, and dependable products designed to help keep your heating and cooling system operating safely and efficiently.

 

MRCOOL Direct