Replacing a 23 year-old Oil Furnace

[dpg]

Your probably still good but personally I wouldn't push it till there's issues. Remember any heating system won't fail on a nice day in July it will be a cold, January night, oh about 2:00 A.M. Not many people drive a car till it just doesn't go anymore and their a lot more expensive. A new high efficiency unit will literally pay for itslef in fuel savings over (most) older models.