A second opinion on an AC replacement quote takes one phone call, one load calculation, and a comparison sheet. It doesn't require a confrontation with the contractor who gave you the first number. Here's how to get one in Palm Beach, Broward, or the Treasure Coast without slowing down a decision you need to make this week.
- A second opinion ac replacement quote usually takes 24 to 48 hours to schedule in South Florida in 2026.
- Ask for a written Manual J load calculation, not a tonnage guess based on the old unit’s size.
- Compare SEER2 rating, warranty terms, and permit handling side by side, not just the total price.
- A.R. Williams Air Conditioning provides flat-rate written estimates before work starts, which makes any comparison straightforward.
Why this matters
Homeowners across Palm Beach County and the Treasure Coast get one AC replacement quote, feel the number is high, and either sign anyway out of heat pressure or walk away with no plan. Neither is a good outcome when a full system runs $6,000 to $14,000 depending on tonnage and brand.
A lot of older homes in this region still have R-22 systems installed before 2010, and salt air near the coast corrodes outdoor coils faster than manufacturers assume in their warranty math. That means two honest contractors can look at the same equipment and reach different conclusions about whether you need a repair or a full replacement. A second opinion isn't about distrust. It's about making sure the diagnosis matches the equipment in front of you, not a generic script.
What you'll need
- The first quote in writing, itemized by equipment, labor, and permit fees
- Model and serial numbers off the outdoor unit's nameplate
- Your home's approximate square footage and number of return vents
- A recent electric bill for a usage baseline
- 30 to 45 minutes for a second contractor's in-home visit
- Any load calculation paperwork the first contractor left behind, if they did one
The steps
1. Get the first quote fully itemized
A verbal number isn't a quote. Ask the first contractor to put tonnage, SEER2 rating, brand and model, labor, permit fees, and warranty terms on paper before you call anyone else.
This accomplishes two things: it gives the second contractor something concrete to react to, and it exposes vague quotes early. A quote that just says "4-ton system, installed, $9,500" with nothing else is the most common mistake homeowners bring into a second opinion, because there's nothing specific to compare against.
2. Pull the equipment nameplate data yourself
Walk out to the outdoor condenser and photograph the nameplate sticker. It lists the model number, serial number, and manufacture date, usually stamped on the side panel.
This matters because age drives a lot of replace-versus-repair decisions, and you want a fact, not a contractor's estimate of age. A unit manufactured in 2011 and a unit manufactured in 2019 get very different recommendations, and the nameplate data settles that argument before anyone opens a toolbox.
3. Request a second in-home visit, not a phone quote
A reliable second opinion requires someone to actually look at your ductwork, attic space, and existing tonnage. Phone-only quotes based on square footage alone miss return air problems that are common in homes built before the 1990s.
Ask directly: "Can you do a load calculation while you're here?" A technician who agrees and walks your attic is doing the job right. One who won't step foot in the house before quoting a number is a signal to keep looking.
4. Ask for a Manual J load calculation
This is the single most useful thing a second opinion can produce. A Manual J calculation factors in square footage, window count and orientation, ceiling height, insulation, and duct condition to land on the correct tonnage, instead of matching whatever was there before.
Oversized systems short-cycle and leave your home humid even when the temperature reads fine. Undersized systems run constantly during a Florida summer and still can't keep up. If the two quotes recommend different tonnage, this is the tool that tells you which one is actually sized correctly.
5. Compare how each contractor handles permits
Palm Beach County, Martin County, and St. Lucie County each run permitting and inspection a little differently, and installation timelines shift depending on which county you're in. Ask both contractors directly who pulls the permit, how long inspection scheduling typically takes in 2026, and whether that timeline is built into their quoted price.
A contractor who quietly skips the permit step to move faster is cutting a corner that shows up later, usually at resale or during an insurance claim.
6. Line up SEER2, warranty, and brand certification
Put both quotes' SEER2 ratings, parts warranty length, and labor warranty length in one place. A lower price paired with a lower SEER2 rating and a shorter warranty isn't automatically the better deal once you run the numbers over 10 years of South Florida cooling load.
Ask whether the installing contractor is factory-certified for the brand they're quoting. Certification affects whether the manufacturer warranty stays valid if something goes wrong down the line.
7. Decide from a comparison sheet, not a gut reaction
Once you have both quotes itemized, both load calculations, and both warranty terms, put them side by side on paper. The right answer usually becomes obvious once tonnage, SEER2, and total cost sit next to each other instead of living in two separate phone conversations from two separate weeks.
Want a straight answer before you sign anything?
Get a written, flat-rate estimate and a technician who explains the tonnage math.
Troubleshooting
The second contractor won't quote without seeing the first bid. This is normal and not a red flag. Share the itemized quote; a contractor who wants full context before pricing anything is being careful, not evasive.
Two load calculations produce different tonnage. Ask both contractors to walk you through their inputs, specifically square footage, insulation rating, and window count. The gap usually traces back to one contractor skipping the attic walk-through.
The second opinion comes with a diagnostic fee. Some companies charge for the in-home visit even if you don't move forward. Ask upfront before scheduling so there's no surprise on the invoice.
A contractor pressures you to sign the same day. A load calculation and a proper quote take time to prepare correctly. Same-day scheduling for the visit is reasonable; same-day signature pressure on a $10,000 decision is not.
Quotes list different SEER2 ratings for what sounds like the same equipment. Ask for the exact model number on both quotes. A base model and a mid-tier model from the same brand line can carry different SEER2 numbers and very different prices.
The second visit uncovers a duct problem the first contractor never mentioned. Undersized return ducts are common in homes built before the 1990s across this region, and they can make a correctly sized system perform poorly. This is worth fixing as part of the replacement project, not after.
Tools and resources
- Itemized first quote, in writing
- Photo of the outdoor unit's nameplate
- Manual J load calculation from at least one visit
- Recent electric bill for a usage baseline
- List of SEER2 ratings, warranty lengths, and permit responsibilities from each quote
What to do next
Once you have two comparable quotes, the decision usually takes a few minutes, not another week of research. If the numbers still don't add up, a technician walkthrough that explains the tonnage and SEER2 math in plain terms is worth more than a third quote from a stranger.
FAQ
What’s the best way to get a second opinion on an AC replacement quote?
Get the first quote itemized in writing, then schedule an in-home visit with a second licensed contractor who will run a Manual J load calculation. Compare tonnage, SEER2 rating, and warranty terms side by side before deciding.
Is it rude to get a second opinion before replacing my AC?
No. Licensed HVAC contractors expect homeowners to compare quotes on a purchase this size. A contractor who discourages a second opinion is a bigger concern than the second opinion itself.
How much does a second AC quote cost?
Many companies provide the estimate visit at no charge in 2026, though some charge a diagnostic fee if you’re not already an existing customer. Ask before scheduling so there’s no surprise.
How long does a second opinion take in South Florida?
Most homeowners in Palm Beach and Broward County get a second contractor scheduled within 24 to 48 hours. The in-home visit itself usually runs 30 to 45 minutes.
Should both quotes recommend the same tonnage?
They should be close if both contractors ran a proper load calculation. A gap of a full ton or more usually means one contractor skipped the walkthrough and guessed based on the old unit’s size.
What if the second contractor recommends repair instead of replacement?
That’s a useful outcome, not a wasted visit. It means the first quote may have moved to replacement too quickly, and a targeted repair could extend the system’s life for less money.
Do second opinions need a new load calculation?
Yes, a fresh Manual J calculation is what makes the second opinion meaningful. Without one, you’re just comparing two guesses instead of two informed recommendations.
How do I know if a quote is inflated?
Compare the SEER2 rating, brand, tonnage, and warranty length against a second quote for the same specs. A price that’s higher with no added warranty coverage or efficiency gain is the clearest sign.
One last thing
Most quote disputes in this region don't come down to price at all. They come down to tonnage: one contractor sizes off the old unit, the other runs a real load calculation, and the two numbers land a full ton apart. Ask for the calculation first, and the rest of the comparison gets a lot easier.
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