Selling a House With an Old Furnace or AC in Indiana?

Can you sell a house with an old furnace or AC in Indiana?

Yes, you can sell a house with an old furnace or AC in Indiana, and most homes change hands with systems well past their prime. What matters is whether the heat source works safely. A functioning older furnace is a negotiation point, but a dead or unsafe one can stall a financed sale because FHA and VA appraisers require a permanent, safe heat source. You’ll need to disclose what you know on Indiana’s Form 46234, and from there you have three paths: replace it, service and credit for it, or sell as-is to a cash buyer.

By René Hauck, REALTOR® | July 1, 2026

A furnace lasts about 15 to 20 years. A central air conditioner runs closer to 10 to 12. So if you’ve lived in your Hendricks County home for a couple of decades, there’s a real chance the system keeping you warm in January and cool in July is original to the house, or close to it.

That’s not a crisis. It’s a conversation, and it’s one I have with sellers in Plainfield, Avon, and Brownsburg all the time, especially folks who are downsizing after years in the same home. The worst thing you can do is panic and drop ten thousand dollars on a new system the week before you list. The second worst thing is to say nothing and hope no one notices. Let’s walk through what actually matters.

The disclosure rule that trips up Indiana sellers

Before an offer is accepted, Indiana sellers hand the buyer a Seller’s Residential Real Estate Sales Disclosure, known as Form 46234. Section D of that form covers your heating and cooling systems, and you mark the condition of each one based on what you actually know.

That last part is the key. Indiana’s standard is your current actual knowledge. You’re not expected to be an HVAC technician. You’re expected to be honest about what you know. If your furnace short-cycles every winter, if the AC quit working two summers ago, or if a contractor told you the heat exchanger is cracked, those are things you know, and the form asks you to say so.

Here’s where sellers get into trouble: they assume selling as-is lets them stay quiet. It doesn’t. As-is means you’re not agreeing to make repairs. It does not mean you can hide a known defect. Concealing something you knew about is exactly the kind of thing that leads to lawsuits, damages, and in some cases a sale that gets unwound months after closing. (I break this down further in my guide to Indiana’s seller disclosure form and what selling a home as-is in Hendricks County really involves.)

A good move before you list: have your system serviced and keep the receipt. A clean tune-up record tells a buyer the unit is cared for, even if it’s older, and it heads off surprises when the buyer’s inspector takes a look.

Where an old furnace becomes a financing problem (and where it doesn’t)

This is the part most sellers don’t expect, and it’s the difference between a minor talking point and a deal that falls apart.

Most buyers in our market use financing, and a big share use FHA or VA loans. Both come with property standards the appraiser has to check. Under HUD’s rules, the home needs a permanently installed heat source that safely warms the living space, runs on a fuel that’s easy to get, and works on its own without someone babysitting it. A heating system that isn’t safe to operate is not allowed, and it has to be corrected before the loan can close.

Translation: a furnace that’s old but works fine is no problem. A furnace that’s dead, red-tagged, or unsafe (think a cracked heat exchanger leaking carbon monoxide) becomes a required repair, and that repair often lands on the seller. Until it’s fixed, your buyer pool narrows to cash buyers and certain conventional loans with more flexibility.

Now the good news on air conditioning. FHA does not require central AC at all. If the AC is there but doesn’t work, the appraiser notes it and the cost to fix it, and it becomes something you and the buyer negotiate. An old or even dead air conditioner is a price conversation, not a financing wall. That single distinction, heat versus cool, changes your whole strategy.

If your furnace is on its last legs and you’re staring down an FHA or VA buyer, this is the moment to call me before you do anything. The right move depends on the system, the buyer’s loan, and your timeline, and a quick conversation can save you from spending money you didn’t need to spend.

Your three options when selling with an old furnace or AC in Indiana

Once you know whether you’re dealing with a working system, a dead one, or an unsafe one, your decision usually comes down to three paths.

Option 1: Replace it before listing. This makes the most sense when the heat source is dead or unsafe and you’re selling to financed buyers, or when the rest of the home is updated and an old clunker of a system is the one thing holding it back. In the Indianapolis area in 2026, a new furnace runs roughly $2,800 to $6,500, a central AC about $3,400 to $7,100, and replacing both together lands around $7,000 to $15,000 for a full system, plus a city permit in the $150 to $190 range. Keep every receipt and any transferable warranty, because that paperwork becomes a selling feature.

One 2026 wrinkle worth knowing: a refrigerant called R-410A stopped being produced on January 1, 2025, and new systems now use a replacement called R-454B. Your existing system can still run and be serviced, but R-410A is getting pricey, so a leak repair that used to cost $300 to $400 can now run $600 to $800. New equipment costs a bit more too, roughly 10 to 15 percent. None of this means you have to replace a working unit. It does mean repairs on an aging system aren’t getting cheaper.

Option 2: Service it, document it, disclose it, and credit for it. For an old-but-working system, this is usually the smartest play. You rarely get your full replacement cost back in the sale price, so pre-emptively buying a new furnace is often money left on the table. Instead, service the unit, disclose its age honestly, and if a buyer pushes on it, offer a closing credit toward a future replacement. A credit costs you less than a full replacement and lets the buyer choose their own system. Two cautions: lenders cap how large a seller credit can be, and a credit can’t paper over an unsafe or non-working heat source that the FHA or VA appraiser flags. For more on this, see my breakdown of seller concessions in Indiana.

Option 3: Sell as-is to a cash buyer. If you don’t want to touch a thing, a cash buyer skips the appraisal and the financing standards entirely, so the furnace’s age stops mattering. The trade-off is price. Cash-for-condition buyers build their margin in, so you’ll typically net well below what a financed buyer would pay. For some sellers, especially in an estate situation or a fast relocation, the speed and certainty are worth it. For most, options one and two leave more money in your pocket.

There’s no single right answer here. The best path depends on the age and safety of your system, the condition of the rest of the home, and who your likely buyer is. That’s exactly the kind of thing I sort out with sellers before we ever put a sign in the yard.

What this means for your sale

An aging furnace or AC almost never stops a sale in Hendricks County. A dead or unsafe heat source can, and that’s the line to pay attention to. Disclose what you know, service the system, and decide whether to replace, credit, or sell as-is based on your buyer and your timeline, not on fear.

Curious what your home is actually worth in today’s Hendricks County market, old systems and all? I’m happy to put together a personalized home valuation and a net sheet that accounts for any credits or repairs, so you walk in knowing your real number. No pressure, no obligation. Reach out here or call/text 317-987-7068.

Want to know what past clients say about working with me? Read my reviews on Google, Zillow, and Realtor.com.

Frequently Asked Questions

Do I have to replace my furnace before selling my house in Indiana?

No. There’s no law requiring you to replace a working furnace before selling. The exception is a heat source that’s dead or unsafe, which an FHA or VA appraiser will flag as a required repair before the loan can close. If your system works, servicing and disclosing it is usually the better financial move than replacing it. Not sure which camp your system falls into? Reach out and I’ll help you figure out the smart play before you spend a dime.

Does an old air conditioner affect a home sale in Indiana?

An old or even non-working AC is a negotiation point, not a financing problem. FHA does not require central air conditioning, so if the unit is dated or dead, the appraiser notes the cost to fix it and you and the buyer negotiate from there. It rarely stops a sale on its own.

What do I have to disclose about my HVAC system in Indiana?

You disclose any heating or cooling defects you actually know about on Section D of Form 46234, the Indiana Seller’s Residential Real Estate Sales Disclosure. That includes things like a furnace that doesn’t heat properly, an AC that stopped working, or a contractor’s warning about a cracked heat exchanger. Selling as-is does not waive this. If you’re unsure how to fill out the form for an aging system, send me a message and I’ll walk you through it.

Should I offer a credit instead of replacing the HVAC?

Often, yes. A closing credit toward a future replacement usually costs you less than buying a new system outright, and it lets the buyer pick their own equipment. Keep in mind that lenders cap how large a seller credit can be, and a credit can’t substitute for fixing an unsafe or non-functioning heat source that an appraiser flags.

How much does it cost to replace a furnace and AC in the Indianapolis area in 2026?

In the Indianapolis area, a new furnace runs roughly $2,800 to $6,500 and a central AC about $3,400 to $7,100. Replacing both as a full system commonly lands between $7,000 and $15,000, plus a local permit around $150 to $190. Costs rose with the 2025 shift to R-454B refrigerant, so newer equipment carries about a 10 to 15 percent premium.