Independent HVAC field reference
HVAC model charts, fault codes, and serial age
Type the number on the cabinet. Charts, serial decode, How To, and charge tables stay open. Diagnose, jobs, and options are the seat — sign in for those.
HVAC charts by brand
Goodman GR9S96 is not GMVC96. Carrier 59SC5 is not Bryant 987M. Open the plate on the cabinet, not the sister SKU.
Amana
16 charts
Bryant
22 charts
Carrier
26 charts
Daikin
9 charts
Goodman
22 charts
ICP
8 charts
Lennox
17 charts
Mitsubishi
3 charts
Rheem
16 charts
Trane
17 charts
Furnace and AC serial number age
Manufacture week is not the install date. A printed date on the rating plate still wins.
Open reference
No account. This is the crawl path.
Model charts
IFC language, fault meaning, and install notes for the number on the cabinet.
Serial age
Decode Goodman, Carrier, Trane, Lennox, Rheem, York, and more. Manufacture date, not install date.
Fault codes
Cross-brand lookup. Carrier 45 is not Rheem 45. Prefer the plate chart when you have it.
Charge PT
Saturation, superheat, and subcooling. R-32, 410A, 454B, 22.
How To
Charge R-32, recover, pull a vacuum, braze, swap a capacitor.
How To: charge, recover, vacuum, braze
All 15Charge an R-32 air conditioner
Weigh it. Stabilize it. Do not treat R-32 like a 410A top-off. A2L rules are the job, not a footnote.
Recover refrigerant
Identify the gas, stay under 80% of the tank, pull the cores, weigh everything. Mixing refrigerants is how you scrap a bottle.
Pull a vacuum on a new unit
Cores out. Gauge on the system, not the pump. Decay is the test. Hitting 500 microns with the pump still running proves almost nothing.
Braze copper with nitrogen
Purge first, then a whisper of flow. POE oil will strip the oxide you leave inside the pipe and park it in the TXV.
Change a run capacitor
Prove 0 VAC, discharge it, match µF, terminals up. A weak cap cooks compressors. A screwdriver spark on A2L is the wrong habit.
Nitrogen tightness test
Pressure is the leak test. Vacuum is the moisture test. Do not skip nitrogen and hope the micron gauge will confess.
Seat
Sign in. Diagnose, jobs, and options are the product.
Field questions
- How do I look up an HVAC model number?
- Copy the model from the rating plate — not the carton sticker. Search it here or open model charts. Sister SKUs (two-stage vs communicating, 80% vs 96%) do not share an IFC.
- How do I find the age of a furnace from the serial?
- Use serial age lookup. Goodman is usually year/month in the first four digits. Carrier often prints the date on the plate. Manufacture date is not the install date.
- Are these manufacturer manuals?
- No. FieldBench is an independent reference. Maker PDFs open on the manufacturer literature page. We do not host, iframe, or proxy OEM files.