about 13-15 years Click to see full answer. Moreover, how long does the average fridge last? 14 to 27 years Secondly, what is the life expectancy of an oven? Average Life Span of Homes, Appliances, and Mechanicals APPLIANCES YEARS Range/Oven Hoods 14 Electric Ranges 13-15 Gas Ranges 15-17 Refrigerators 9-13 Beside above, when should I replace my oven? Oven ranges should usually last you around 10 to 15 years, so if your oven is over 15 years old, now could be an appropriate time to consider a full oven replacement.How long should an oven last NZ?A cheap toaster will be toast within two years — but a high-end oven should still be cooking two decades after purchase. That’s according to Choice, which has issued new guidelines on the “reasonable” life expectancy for household electrical goods.