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Heatilator 4021-642 High Limit Switch | 350°F Auto Reset
Special Order Notice
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Heatilator 4021-642 High Limit Switch | 350°F Auto Reset
The 4021-642 high limit switch is a temperature-operated replacement for the specified Heatilator appliances below. The product drawing identifies a normally closed switch that opens at 350°F and resets automatically. Its flush face, mounting ears and vertical electrical terminals must match the original installation.
Key Features
- Normally closed high limit switch.
- Opens at the specified 350°F temperature rating.
- Automatic reset operation.
- Flush-face switch body with two mounting ears.
- Vertical electrical terminal orientation shown in the dimension drawing.
Specifications
- Part number: 4021-642
- Cross-reference: SRV4021-642
- Contact state: Normally closed
- Opening rating: 350°F
- Reset: Automatic
- Face: Flush
- Terminal orientation: Vertical
- Body diameter shown: 11/16 in.
- Mounting hole spacing shown: 15/16 in. center to center
- Body depth shown: 3/8 in. (excluding terminal projection)
Compatibility
Match the original part number, exact model, ignition system and any applicable production range. A shared fireplace brand or similar appearance alone does not establish compatibility.
Cross Reference
- Heatilator: 4021-642 / SRV4021-642
Fireplace Models
The following exact models are supported by manufacturer service-parts information. This is a verified selection, not a universal or exhaustive fit list.
- Heatilator: GCDC36E, GCDC36LE
- Heatilator: GCDC42E, GCDC42LE
- Heatilator: GCDC60E, GCDC60LE. Pre 17/99 only. The manufacturer does not list this switch for Post 17/99 units.
- Heatilator: CB4236IR
- Heatilator: CB4842IR
- Heatilator: CB4236MIR
What's in the Box
One 4021-642 high limit switch, as pictured.
Before Ordering
- Use only the specified temperature rating and contact configuration. Never bypass a safety limit switch.
- Match the model and, for GCDC60E/GCDC60LE, the production code before ordering.
- Have a qualified fireplace service technician verify the replacement and follow the appliance manufacturer's service instructions.
Important Note
This is a special-order item. Confirm availability and lead time before ordering. Installation and safety testing must be performed by a qualified gas-appliance technician. Do not bypass safety devices.
Why Choose This Replacement?
The specific part-number and model details help you compare this service component with your original appliance parts list before ordering.