Top 10 HVAC Parts Every Tech Should Carry on Their Van

Your first-call fix rate directly impacts your revenue and customer satisfaction. Keep these parts stocked and you will close more jobs same-day.

The Essential 10

1. **Dual run capacitors** (35/5, 40/5, 45/5 MFD) — The number one callout part in summer.
2. **Contactors** (1-pole and 2-pole, 24V coil) — Cheap, fails often, easy swap.
3. **Hard start kits** — Saves compressors and buys customers time before replacement.
4. **Flame sensors** — Universal flame sensor covers most residential furnaces.
5. **Ignitors** (universal hot surface) — Carry both round and flat styles.
6. **Thermostat wire** (18/5, 100ft) — You will need it more often than you think.
7. **Condensate pump** — For those units with clogged drain situations.
8. **Filter drier** — Essential for any refrigerant work.
9. **Schrader valve cores and caps** — Tiny parts that cause big problems when missing.
10. **Fuses** (3A, 5A, 10A) — Quick fix for blown control board fuses.

How to Restock Smart

Track which parts you use most over a 90-day period. Use PartHawk to price-compare across suppliers before restocking — you can save 20-40% by buying from the right source.