Heil Serial Number Decoder

Decode your Heil HVAC serial number to find manufacture year, month, and age. Heil is a Johnson Controls ICP brand using the same serial format as York.

Serial Number

Brand (optional — leave blank to auto-detect)

📍 Where to Find Your Heil Serial Number

✓Outdoor unit: Data plate on the side panel
✓Furnace: Inside the access door, on the cabinet wall
✓Air handler: Exterior sticker near the bottom
✓Heil serial numbers start with H, J, K, or L for equipment manufactured from the 1990s onward

🔤 Heil Serial Number Format

Heil (part of the ICP/Johnson Controls family) uses the York serial number format. Position 1 = decade letter (H=1990s, J=2000s, K=2010s, L=2020s). Position 2 = year digit (0-9). Positions 3-4 = month number (01-12). Example: "K5031234567" = K (2010s) + 5 = 2015, month 03 = March 2015.

J5031234567

J = 2000s, 5 = 5th year = 2005, 03 = March. Manufactured March 2005.

K8111234567

K = 2010s, 8 = 8th year = 2018, 11 = November. Manufactured November 2018.

L2071234567

L = 2020s, 2 = 2nd year = 2022, 07 = July. Manufactured July 2022.

How Heil Serial Numbers Work

Heil is part of International Comfort Products (ICP), a division of Johnson Controls. Other ICP brands include Tempstar, Arcoaire, Comfortmaker, and Day & Night — all of which use the same serial number format as York and Heil. The decade letter system (H, J, K, L) makes Heil serials easy to date at a glance. J-prefix units are from the 2000s, K-prefix from the 2010s, and L-prefix from the 2020s. The second character gives the specific year, and the third and fourth characters give the month (01-12).

Why Decode Your Heil Serial Number?

Heil serial decoding helps with warranty claims (10-year registered, 5-year unregistered), repair cost calculations, and determining R-22 vs R-410A refrigerant type based on manufacture year.

💡 Pro Tips

Heil, Coleman, York, Luxaire, Champion, and other Johnson Controls brands all use the same serial format. This Heil decoder can be used for all ICP/Johnson Controls brands.

Frequently Asked Questions

Is Heil a good HVAC brand?

Yes. Heil is an ICP/Johnson Controls brand known for reliability. It's positioned as a mid-tier brand below York's premium offerings but uses the same manufacturing quality.

What does "K5" mean in a Heil serial?

"K" = 2010s decade, "5" = 2015. A Heil serial starting with "K5" was manufactured in 2015.