A replacement quote often comes with a financing option attached. The lines that describe that option can change the total you pay more than the equipment line does. Read them with the same care you give the scope of work.
Separate the installer from the lender
Many financing offers come from a third party. The installer may present the offer, but the lender holds the loan and sets its terms. Ask who the lender is, whose name appears on the agreement, and where payments go. Keep the lender's terms in a separate file from the equipment paperwork.
Read the rate type and the term
Find out whether the rate is fixed or variable, and how long the loan runs. A longer term usually lowers the recurring payment but raises the total interest. Compare the total you will pay over the life of the loan, not only the recurring payment shown on the page.
Check for deferred interest and promotional periods
Some offers advertise a period without interest. Read whether interest is waived or only postponed, and what happens if the balance is not cleared before that period ends. Ask for the closing date of the period in writing. Read the rule for missed payments too, since it can affect the rest of the loan.
Look at fees and prepayment
Ask about origination fees, late fees, and any charge for paying early. Ask whether early payment is allowed without penalty. These lines often sit in a separate schedule, so ask for the full schedule and not just the summary.
Compare the total and the scope
Put the cash price and the financed total side by side, with the same scope on each. A lower recurring payment can hide a higher total. If the quote changes when you choose financing, ask the reason in writing.
This page does not list any price or rate. For the planning window before you compare offers, check the central air conditioner service life page, and use the published tables on this site for the figures.