Walk in. We test every part free at the counter. Open to homeowners, contractors, and multifamily — no account or minimum order.
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Ten departments, organized the way our counter is. Every category is on the shelf today.
Bring your old part. We'll diagnose it, find the replacement, and bench-test the new one at the counter before you leave — so you only make one trip.
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This is a specialty-sized pleated air filter for HVAC systems. Pleated filters capture significantly more dust, pollen, and allergens than basic fiberglass filters and last longer between changes.
![MSHCST - DUAL CHUCK (SAWTOOTH, SHORT [2], 1/4-5/16)](https://otp-hvac.com/wp-content/uploads/2024/11/MSHCST_SAWTOOTH_BIT-300x300.jpg)
Malco MSHCST SawTooth dual hex driver, 2″ short length. Reversible 1/4″ and 5/16″. SawTooth tip grips stripped screws that smooth drivers slip on.
R-454B refrigerant, 20 lb cylinder. Low-GWP replacement for R-410A in new systems. A2L mildly flammable — requires proper handling. The future of residential AC refrigerant.
Lennox direct spark ignition integrated control board, catalog number 21W14. The board manages the furnace ignition sequence and blower timing, driving the spark igniter and gas valve and monitoring flame.
ToughBuilt electrician’s folding utility knife. Combines knife, wire cutter, prying tool, and screwdriver in one compact folding design.
50+7.5 MFD 440V dual run capacitor. Powers both the compressor and condenser fan motor. Budget-friendly TrueLine replacement for residential AC.
20″W x 16″T return air filter grille. Holds a standard 1″ filter. Removable hinged face for easy filter changes. White steel, mounts on wall or ceiling.
Snap-disc furnace high-limit switch from the DL series; the number is the opening (cut-out) temperature in degrees F. It is a safety device that breaks the heating circuit when the plenum overheats, and a limit that keeps tripping points at restricted airflow or a failed blower rather than at the switch.
3/4″ straight liquid-tight fitting. Connects liquid-tight conduit to a junction box or disconnect. Non-metallic, weatherproof.