Locate the serial number on your Lochinvar water heater and check the first letter. While 40+ years is not the norm for a water heater life expectancy of any brand, it’s not impossible. I’ve even seen a unit or two from the late 1970’s still in place and running just fine. I do find some really old heaters from time to time during my home inspections in Louisville, KY. Most water heaters typically need to be replaced every 10 years or so some don’t even last that long. Now, most folks with experience can simply look at a water heater and tell if it is 20 or 40 years old, but you as a homeowner may not be able to do that. For example: If your water heater serial number begins with A, then we know it can be either a 2004 or 1984 unit. Lochinvar recycles these letters every 20 years. The rest of the serial numbers are internal tracking and production numbers from Lochinvar itself, and they shouldn’t matter much to you as a homeowner.īelow is a Lochinvar water heater aging table to show what letter each means. The first letter in the serial number denotes the year the unit was manufactured, and the second letter is the month it was made. Lochinvar uses a 20-letter rolling letter code to age their water heaters.
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