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In heating and cooling setups, these components manage the operating cycles or serve as thermal control limits to maintain proper operating conditions.
Specifications
- Part number: 46910700
- Brand: APW
- Part type: Thermostat
- Height: 0.5 In
- Length: 2.125 In
- Width: 1.125 In
Part listings show 46910700 as superseded by APW2T-69107. Check the newer number too.
- 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 Thermostat Does
A thermostat controls system operation based on temperature. Most central systems use 24 V thermostats, while baseboard heaters use line voltage. Control signals allow the equipment to start or stop heating and cooling cycles.
Limit switches open when they sense too much heat and shut the burners off. They protect equipment from running when operating conditions become unsafe.
Understanding the 46910700 Dimensions
When you check a replacement part, physical dimensions are important to ensure it fits into the mounting space or bracket properly.
The 46910700 thermostat lists specific measurements in its equipment specifications:
- Height: 0.5 In
- Length: 2.125 In
- Width: 1.125 In
How to Confirm a Match
To ensure you have the right replacement, check the physical stamp on your existing hardware. Do not guess based on appearance alone.
Verify the voltage requirements, system type, and physical size to make sure the replacement fits your installation.
- Confirm the part number 46910700 is clearly stamped on the old body or label.
- Check if your setup requires a 24 V or line voltage thermostat, as they are not the same.
- Check the system type such as gas, electric, or heat pump as listed for your equipment.
- Review your heating and cooling stages, as well as whether a C wire is needed by your model.
Safe Replacement Practices
Before removing any connections, take a clear photo of which wire goes to which terminal. Move wires one at a time to the matching spots on the replacement.
Make sure all power is cut at the breaker before starting work. If a limit switch has tripped, determine what caused the high heat condition rather than simply resetting or bypassing the part.
Read your old part
- Turn off all power to the equipment at the breaker or service switch.
- Locate the installed thermostat and wipe away any dust or grease covering the identification stamp.
- Read the part number directly off the housing to verify it shows 46910700.
- Measure the height, length, and width to verify it matches 0.5 In by 2.125 In by 1.125 In.
- Check the system wiring and verify if your equipment uses 24 V or line voltage.
When to call a pro
Hire a licensed HVAC technician for any step you are not sure you can do safely. If you smell gas, do not touch any switch, leave the house immediately, and call your gas company from outside.
Questions
Has the APW 46910700 part number been updated?
Yes, records show this part has been superseded by part number APW2T-69107. You can check for either number when verifying equipment documentation.
Can I replace a 24 V thermostat with a line voltage thermostat?
No, 24 V and line voltage controls are not the same. Most central heating and cooling systems use a 24 V control signal, while baseboard heaters use line voltage.
What should I do before disconnecting any thermostat wires?
Shut off power to the furnace or air handler at the switch or breaker. Take a photo first so you have a record of which wire attaches to which letter or terminal.
Can I bypass a limit switch if it keeps opening?
Never bypass a limit switch. Limit switches are safety devices that open when they sense too much heat, and bypassing them can cause severe equipment damage or fire.
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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.