Thermo-Kool 414900 Flush Walk-In Door Latch with Knob Release

Thermo-Kool 414900 Flush Walk-In Door Latch with Knob Release

The Thermo-Kool 414900 is a 1238-C door latch with an inside knob release for compatible flush walk-in refrigeration doors. This locking handle assembly engages the matching strike to retain the door in its closed position while providing an interior release mechanism.

Use OEM part number 414900 when identifying replacement hardware for your Thermo-Kool walk-in cooler or freezer. Confirm the original latch, mounting arrangement, and jamb thickness before ordering. Correct latch alignment helps the door remain seated against its gasket without requiring excessive closing force.

Specifications and Configuration

• Equipment brand: Thermo-Kool.
• OEM part number: 414900.
• Latch designation: 1238-C.
• Part type: Locking door latch with inside knob release.
• Door configuration: Flush offset.
• Handle material: Die-cast zinc.
• Finish: Polished chrome.
• Locking features: Cylinder lock and padlock provision.
• Handing: Suitable for right- or left-hand installation when correctly configured.
• Standard jamb application: 4-inch configuration; verify the required release-rod arrangement for your door.

Common Failure Symptoms

• The walk-in door will not remain latched after closing.
• The handle sticks, binds, or develops excessive movement.
• The latch does not engage the strike consistently.
• The lock cylinder or inside release mechanism is damaged.
• The handle housing or mounting points show cracking or deformation.

Inspect the hinges, strike alignment, gasket, and door closer before replacing the latch. Door sag, ice buildup, or a damaged gasket can interfere with closure even when the latch itself is functional.

Applications and Compatibility

This assembly is intended for commercial walk-in door service where Thermo-Kool part 414900 and the corresponding flush latch configuration are specified. It is not a universal replacement for every Thermo-Kool door or every latch in the same hardware family.

Confirm the equipment serial number, original hardware identification, door offset, jamb thickness, and mounting-hole pattern. A similar-looking handle can have a different release mechanism or installation requirement.

Before You Order

1. Match OEM number 414900 to the required replacement assembly.
2. Verify that the door requires flush-offset hardware.
3. Measure the jamb thickness and compare the existing release-rod arrangement.
4. Check mounting-hole spacing and the strike's position relative to the handle.
5. Confirm the supplied components and any separately required mounting fasteners.

Installation and Operational Checks

Have a qualified service technician follow the applicable latch installation instructions. Correct loose hinges or door sag before positioning the handle and strike. The release rod must align correctly through the jamb, and the inside knob must not be overtightened.

After installation, verify smooth exterior handle operation, consistent strike engagement, even gasket contact, and proper inside release operation according to the manufacturer's instructions before returning the door to service.

Frequently Asked Questions

What is Thermo-Kool part 414900?

It is the Thermo-Kool 1238-C latch assembly with a knob release, used for compatible commercial walk-in door applications.

Is this latch intended for a flush door?

Yes. This configuration uses a flush offset. Confirm the relationship between the closed door and jamb before selecting replacement hardware.

Does this latch have an inside release?

Yes. The assembly uses an inside knob release. Correct release-rod alignment and unobstructed operation are essential installation checks.

Can it be installed on either door handing?

The handle design supports right- or left-hand installation. Match the required orientation and follow the installation instructions for the door being serviced.

Will it fit any jamb thickness?

Do not assume universal fit. The standard configuration is associated with a 4-inch jamb application. Confirm the release hardware required for a different thickness before ordering.

Will a new latch repair a sagging walk-in door?

A latch does not support the door's weight. Inspect the hinges, mounting surfaces, and door alignment first. A misaligned door can prevent a new latch from engaging properly.

Need fitment assistance? Call 631-873-0509 with your equipment serial number, original part number, and door measurements.

Browse additional Thermo-Kool refrigeration parts or compare walk-in door latches and hardware.