Lennox Repair / Replacement
I have a 18 year-old Lennox A/C and furnace that I don't know how to proceed with. We live in Nebraska with hot/humid summers and generally cold winters.
We recently moved into the house and the sellers provided us with a home warranty with a local company due to the age of the units. We have a 1 1/2 story with 2 aging units that are not very efficient but until 3 weeks ago worked ok. Don't know of the exact sizes of each of the units, but the larger (I think a 3.5 ton 10 SEER unit) developed an A-Coil leak over the past week.
The home warranty will cover the A-Coil replacement but I could, instead, use the coil replacement cost towards the purchase of a new system from the warranty company. They sell and install American Standard equipment. If I decided to go this route I would get a number of quotes to make sure that I wasn't getting a bad price just due to the credit.
The technician was very helpful and explained to me a lot about the systems that I had. He indicated that the Lennox A/C was pretty reliable and could be "repaired" but he had seen more problems with the furnace (heat exchanger cracking).
Obviously, I would like to have new equipment but we are looking at a number of improvements to our house so I would like to delay the Heating/ A/C replacement until at least next summer.
Couple of questions for the experts out there I would like your advice on:
How much does pricing fluctuate between the year? Is the pricing right now (at the end of the cooling season and before the beginning of heating) a good time to buy?
I think I can wait on the coil replacement until next spring - what's the likelihood of my heat exchanger cracking on a unit this old?
Any help/thoughts would be appreciated.