Expert advice on HVAC age, appliance dates, warranty claims, and repair decisions.
How to find and read a Whirlpool serial number on a fridge, washer, dishwasher, or microwave — where the label is, what the code means, model vs. serial, and how to check your warranty.
Read more →Four proven ways to find the exact age of your air conditioner — from the serial number to the model number, the inspection record, and the manufacturer. Plus what the age means for your wallet.
Read more →How to tell which refrigerant your air conditioner uses, why it matters for repair and replacement decisions, and how the unit's age gives you the answer in seconds.
Read more →Decode any Rheem or Ruud serial number to find the manufacture date of your AC, furnace, heat pump, or water heater. Includes the week-and-year date code format with real examples.
Read more →A real estate buyer's guide to checking HVAC and appliance age during a home purchase. How to read serial numbers, what ages to watch for, and how to negotiate.
Read more →A complete HVAC maintenance checklist from an EPA-certified technician. Monthly, seasonal, and annual tasks to maximize system lifespan and efficiency.
Read more →Should you repair or replace your HVAC system? An HVAC technician explains the exact decision framework, cost benchmarks, and age thresholds to guide your choice.
Read more →Wondering how long your furnace, AC, or heat pump will last? An HVAC technician breaks down real-world lifespans, warning signs, and when to repair vs. replace.
Read more →Decode your water heater serial number to find the manufacture date. Covers Rheem, Bradford White, AO Smith, State, American, and Kenmore water heaters.
Read more →Learn how to decode your refrigerator's serial number to find its manufacture date. Covers Whirlpool, GE, LG, Samsung, Maytag, Frigidaire, and more.
Read more →Decode your Goodman HVAC serial number to find the manufacture date. Includes the complete Goodman date code format for all units made since 1992.
Read more →Decode Lennox HVAC serial numbers to find the manufacture date of your furnace, air conditioner, or heat pump. Includes format guide for all Lennox serial number styles.
Read more →Decode Trane serial numbers to find the manufacture date of your furnace, AC, or heat pump. Includes the complete Trane date code chart and real examples.
Read more →Learn how to decode Carrier HVAC serial numbers to find the manufacture date of any furnace, air conditioner, or heat pump. Includes format guide for all Carrier serial number styles.
Read more →HVAC serial numbers encode manufacture date, factory, and production info. Learn what each section means, why it matters, and how to decode it for any brand.
Read more →New guides on serial numbers, maintenance, and money-saving decisions.
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