Description
Product Summary
The Caleffi 521519AC is a thermostat from Caleffi, described by the manufacturer as: 3/4" sweat thermostat mixing valve with ChecksLow lead brass with adapter and temperature gauge 85-150F 200 PSI.
A thermostat reads the room temperature and tells the heating and cooling equipment when to run. Matching the thermostat to the system's stages, heat pump or conventional setup and power source is the key to a correct replacement. Replace a thermostat that reads the wrong temperature, will not call for heat or cooling, has a blank display or does not support the equipment's stages.
Before you order, match 521519AC to the part number on the part you are replacing or in your equipment's repair parts list, and confirm the voltage, size and connections match your equipment. If you are not sure which part your equipment needs, call us at 1.888.509.3391 with the model and serial number and we will confirm it for you.
Key Features
- Genuine Caleffi part: Manufacturer part number 521519AC, factory new.
- Part type: Thermostat.
- Ready to ship: In stock with live quantities shown on this page.
Frequently Asked Questions
Is this a genuine Caleffi part?
Yes. This is the Caleffi 521519AC, a factory-new thermostat from Caleffi.
How do I make sure it fits my equipment?
Compare 521519AC with the part number printed on the part you are replacing or listed in your equipment's repair parts list, and confirm the voltage and connections match. If you are not sure, call us at 1.888.509.3391 with your model and serial number and we will confirm it.
Will this thermostat work with my system?
Check the number of heating and cooling stages, whether the system is a heat pump or conventional furnace and air conditioner, and whether a common (C) wire is available if the thermostat needs one.
Should a professional install this part?
Yes. Gas, electrical, hydronic and combustion components should be installed by a qualified technician who can test the system afterward and follow the codes that apply where you live.
