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If you are holding an old unit with this number, checking the markings and physical size will help ensure you have the right part for your equipment.
Specifications
- Part number: 1053-00004-00
- Brand: Fetco
- Part type: Thermostat
- Height: 1.05 in / 2.67 cm
- Length: 2.4 in / 6.10 cm
- Width: 2.65 in / 6.73 cm
- System: gas, electric or heat pump, as listed
- Stages: heat and cool stages your system uses
- C wire: needed by some models, check yours
From the maker's and parts sellers' listings for this number. Compare them with the label on your old part.
What the Part Does
A thermostat acts as a temperature-activated switch within an electrical circuit. It responds to changes in heat levels to open or close contacts.
This regulates heating operation and helps protect the equipment from overheating. Devices like limit switches open when they sense too much heat and shut the heat source off.
Understanding the Part Dimensions
Physical space inside equipment compartments is often tight. Matching the dimensions ensures the component fits correctly into the original mounting spot.
- Height: 1.05 in / 2.67 cm
- Length: 2.4 in / 6.10 cm
- Width: 2.65 in / 6.73 cm
Confirming a Matching Replacement
Thermostats can use low voltage or line voltage depending on the system design. Most central systems use 24 V controls, while other heaters use line voltage. They are not the same, so verify your voltage type before installing a replacement.
Inspect the physical shape and terminal positions on your existing part. Compare them directly against the specifications to ensure the bracket and wires line up.
Signs of Failure and Safe Replacement
A faulty thermostat may cause the heating circuit to stop working entirely, or it may fail to cut power when normal operating temperatures are exceeded. Never bypass any safety switch or limit device to force a system to run.
Follow these simple steps when servicing the unit:
- Shut off power at the main electrical breaker or switch.
- Use a voltage meter to confirm that power is completely disconnected.
- Take a photo of every wire connection and its marking.
- Remove the mounting hardware and pull the old part free.
- Install the replacement and move wires one at a time to the same spots as shown in your photo.
Read your old part
- Locate the label or stamped text on the body of your old switch.
- Verify that the part number reads 1053-00004-00.
- Measure the old part to confirm it matches the height of 1.05 in / 2.67 cm, length of 2.4 in / 6.10 cm, and width of 2.65 in / 6.73 cm.
- Check the wiring connections and voltage type to ensure they match your system configuration.
When to call a pro
Hire a licensed HVAC technician or electrician for any step you are not sure you can do safely. If you ever smell gas during service, do not touch any electrical switch. Leave the building immediately and call your gas company from outside.
Questions
What are the exact dimensions of part 1053-00004-00?
The dimensions are 1.05 in / 2.67 cm in height, 2.4 in / 6.10 cm in length, and 2.65 in / 6.73 cm in width.
Can I bypass this switch if the heater will not run?
No. Never bypass limit switches or safety devices. They are designed to protect equipment and property by shutting down operation when abnormal heat is detected.
What should I do before disconnecting the wires?
Always turn off power at the breaker and test to confirm it is off. Take a photo of the wire placement so you can reconnect every wire one at a time to the matching spot.
Related part numbers
- 1053-00003-00Thermostat, FetcoSame brand and type
- 11930Thermostat, GaylordSame part type
- 1067-00001-00Capacitor, FetcoSame brand
- 18781Thermostat, GaylordSame part type
- CT87K1004Thermostat, HoneywellSame part type
- 108035Board Assembly Reference, FetcoSame brand
- 1052-00033-00Solid State Relay Reference, FetcoSame brand
- 18782Thermostat, GaylordSame part type
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Brand names and part numbers identify the part and show fit. HVAC Fitter is not affiliated with, authorized by, or endorsed by any equipment maker. If you are not sure a repair is safe for you, call a licensed HVAC technician.