Furnace and HVAC controls are the parts that start, stop and regulate a heating or cooling system. This collection lists replacement control boards, ignition modules, thermostats, gas valves, draft inducers, pressure switches, limit switches, flame sensors and similar controls and parts. It does not include complete furnaces, packaged air-conditioner systems, or melting or jewelry furnaces.
The most reliable way to order a board, valve or similar part is to match the part number on the sticker or silkscreen of the part you are replacing, and to confirm the furnace or air-handler model from the unit's rating plate. Listings often show more than one number; compare all of them with the part in hand. These parts are model-specific, so a board or valve that looks similar may not be interchangeable. Each product page states the condition (new, used or refurbished) and any warranty terms the listing provides.
Gas furnaces and their ignition and control circuits use line voltage and fuel gas. A licensed HVAC technician should diagnose the fault and install the replacement. This page is a buying guide only and is not installation or repair advice.
Related: HVAC control board and thermostat replacement basics.
Frequently asked questions
How do I find the part number on a control board or thermostat?
On a control board or ignition module, look for a sticker or printed code on the board itself. On a thermostat, check the back, the wall plate or the device menu. Write down every letter and number, then confirm the furnace or air-handler model from the unit's rating plate.
Will a board or thermostat from a different model work in my system?
Only if the part number matches, or the listing names your furnace, air-handler or thermostat model. Boards and valves with the same shape can have different wiring, firmware or gas ratings.
Do I need a licensed technician to replace these parts?
Yes. Replacing a furnace control board, gas valve, igniter or similar part can involve fuel gas and line voltage. Use a licensed HVAC technician for diagnosis and installation.
What condition are these parts in?
It varies by listing. Each product page states whether the part is new, used or refurbished.
Items are sold by Manu; many ship directly from partner suppliers, and each product page lists the vendor and condition. See our Shipping Policy and Refund Policy, or how Manu works.
