Keep your heating and cooling systems running safely and efficiently with HVAC controls and related components that switch, power and protect key equipment. From everyday repairs to system upgrades, Ace carries dependable heating supplies and parts so your equipment responds accurately to thermostat commands and maintains comfortable temperatures.
Key HVAC Control Components
HVAC controls are the low-voltage and line-voltage parts that manage compressors, blowers, heat strips, burners and safeties. Use this quick overview to match parts to your system and task.
- Contactors: Electrically operated switches for compressors and condenser fans. Match coil voltage (often 24 V), contact rating and number of poles to your equipment.
- Transformers: Step down line voltage to 24 V for thermostats and control circuits. Match primary/secondary voltages and VA rating to the connected load.
- Oil burner controls: Primary controls for oil-fired systems that supervise ignition, flame detection and safety lockout. Choose models compatible with your burner and cad cell sensor.
- Flame sensors/detectors: Replace worn sensors to help maintain reliable burner or furnace operation. Match probe style, length and connector to your unit.
- Oil filters (for oil heat): Spin‑on and canister styles help protect pumps and nozzles. Select micron rating and connection type that match your burner.
- Radiator vents and valves (steam): Replace aging vents to balance room temperatures and use the correct valve size and style for your system.
How to Choose the Right Control
A few quick checks make selection faster and help ensure a smooth install.
- Confirm compatibility: Reference your equipment model and the existing part number; compare connector styles, ratings and mounting.
- Match electrical specs: Verify coil/control voltage, amperage/HP ratings and VA capacity before you buy.
- Check installation details: Review terminal labels, wiring diagrams and dimensions to ensure a smooth fit and service access.
Also consider the mounting footprint and enclosure rating for your location, and photograph wiring before removal to speed setup.
What are Common Signs a Contactor or Transformer is Failing?
Common signs include an outdoor unit that won’t start or short cycles despite a thermostat call, a contactor that chatters, has pitted or stuck contacts, or a transformer that runs hot or repeatedly blows the 24 V fuse. You may also notice intermittent loss of 24 V control power that causes random lockouts. Confirm with a meter or consult a qualified technician before replacing parts.
How Do You Choose an Oil Burner Primary Control or Flame Sensor?
Start by matching the replacement to your burner model and the existing part number. Verify control voltage, connector style, cad cell/flame sensor type and required safety timings; use a universal kit only if it is listed for your application. Always follow the wiring diagram and consider professional installation for oil‑fired equipment.
Shop HVAC Controls Near You at Ace Hardware
Find contactors, transformers and other HVAC controls online and at your local Ace. Our helpful team can assist with matching voltages, ratings and terminal styles, and point you to related items like thermostat wire, fuses and service tools. From quick fixes to planned upgrades, Ace makes it easy to choose the right HVAC controls and get your system running with confidence.
Round out the repair with complementary parts that help systems start and run reliably. Thermostats provide accurate temperature control and scheduling, igniters restore dependable furnace starts, and thermocouples maintain safe flame sensing on standing-pilot appliances.
