Johnson Controls A19AAF-21C - Line Voltage Mechanical Thermostat, Heat or Cool, 40 to 90 F, Screwdriver, 120 to 277 V AC, 1 C, 1 H
Johnson Controls A19AAF-21C - Line Voltage Mechanical Thermostat, Heat or Cool, 40 to 90 F, Screwdriver, 120 to 277 V AC, 1 C, 1 H
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Commercial Ordering FAQ
How do I verify that Johnson Controls A19AAF-21C - Line Voltage Mechanical Thermostat, Heat or Cool, 40 to 90 F, Screwdriver, 120 to 277 V AC, 1 C, 1 H is the correct replacement part for my equipment?
Check the OEM part number (A19AAF-21C) against your equipment nameplate or the manufacturer's repair parts list before ordering. If you are not sure, call the National Boiler Supply order desk at 850-565-3492 and we can cross-reference your equipment model and serial numbers before the order ships.
What are the shipping and freight options for JOHNSON CONTROLS orders?
Standard parcel orders ship quickly from commercial distribution centers. Shipping is a $35 flat rate on orders under $999, and qualifying orders of $999 or more ship free by ground. Heavy equipment that has to move by LTL freight is quoted after the order is placed and confirmed with you before dispatch.
Can contractors or facility managers request a formal quote or use a Purchase Order (PO)?
Yes. National Boiler Supply works with commercial contractors, mechanical engineers, municipalities, and facility teams. Call 850-565-3492 for a formal quote, bulk pricing, or PO and tax-exempt order processing.
What if this JOHNSON CONTROLS part is marked Call to Order or needed for an emergency repair?
Call our order desk at 850-565-3492. We can confirm factory lead times right away and arrange expedited air or hot-shot delivery when a repair cannot wait.
Line Volt Mechanical Tstat, Thermostat Switch Type SPDT, Thermostat Control Range 40 Degrees to 90 Degrees F, Thermostat Voltage 120 to 277VAC, Full Load Amps @ 120VAC 15A, Full Load Amps @ 240VAC 3A, Thermostat Programmable No, Remote Sensing Capability Yes, Thermostat Heating/Cooling Heating/Cooling, Thermostat Item Line Voltage Mechanical Thermostat, Remote Sensing Bulb Included Yes, Switch Action Open/Close on Fall, Number of Switches 1, Differential 1.5 Degrees F, Height 4-13/32 In.
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.