20 Questions to Ask When Buying a Used Chiller

A used chiller is one of the few purchases where the right five minutes of questions can save you twenty thousand dollars. We buy and resell industrial chillers constantly, so we know exactly which answers reveal a solid machine and which ones expose a unit you should walk away from.

Here are the 20 questions we'd ask any seller — broker, contractor, auction house, or plant owner — before committing to a used chiller in Florida or anywhere else. Ask them in order. The pattern of answers tells you more than any single reply.

Questions about the machine itself

1. What's the full nameplate data? Model, serial number, tonnage, refrigerant type, voltage, and full-load amps. If a seller can't send a clear nameplate photo, that's your first red flag.

2. What's the manufacturer and vintage? York, Carrier, Trane, McQuay, Daikin, Multistack, and Johnson Controls all hold value and have parts support. Odd brands and units over 25 years old carry more risk. See our best used chiller brands breakdown.

3. What refrigerant does it run? R-134a, R-1234ze, and R-513A are current and serviceable. R-22 and R-123 are phased down or out and price the unit closer to scrap-plus-core. Our used chiller refrigerants explained guide covers what each one means for you.

4. Is it air-cooled or water-cooled? This changes install cost, footprint, and operating expense — especially in Florida heat. Read air-cooled vs water-cooled used chiller.

5. Centrifugal, screw, or scroll compressor? Centrifugals dominate the 300-ton-and-up world; screws are workhorses in the mid-range. Each has different maintenance economics.

Questions about condition and history

6. When did it last run, and for how long before removal? A unit running the month it was pulled is worth far more than one that sat idle for three years.

7. Was it on a maintenance contract? Documented service history is the single most valuable piece of paper attached to any used chiller.

8. Why was it removed? Capacity upgrade and building demolition are good answers. "It kept faulting out" is not.

9. Any known leaks, repairs, or open faults? Get this in writing. A surprise discovered on delivery day is a renegotiation you'll lose.

10. What's the condition of the tube bundles? On any unit over 15 years old, ask for eddy-current test results. Corroded or plugged tubes are a major, expensive repair — especially on coastal Florida machines exposed to salt air.

11. Are the controls, VFD, starter, and safeties complete and original? A partially stripped chiller is worth a fraction of a complete one. Confirm nothing was harvested before sale.

12. Has the refrigerant charge been recovered or is it still in the machine? Affects both value and the removal process.

Questions about the deal

13. What's the price, and does it include removal and rigging? These are usually separate line items. Know what's bundled. Our used chiller prices in Florida guide sets expectations.

14. Is there any warranty or return? Most used chillers sell as-is, but reputable resellers offer limited coverage on tested units. See do used chillers come with a warranty.

15. Has it been tested or reconditioned? "Tested" and "reconditioned" mean different things at different price points. Read reconditioned vs used chiller.

16. Can I inspect it or have a tech inspect it before purchase? A seller who refuses inspection on a running unit is hiding something.

17. Where is it located and what's the rigging path? Distance drives freight; a basement mechanical room with a tight path drives rigging cost. Both hit your total.

18. What's the delivery timeline? In Florida, hurricane season tightens rigging and freight from June to November. Confirm a firm window in writing.

19. Can you provide service records and removal photos? The units with the best documentation are almost always the best units.

20. Are you the actual holder of this equipment, or brokering it? Nothing wrong with a good broker, but you need to know how many hands the unit has passed through and whether the person quoting you has actually seen it run.

The Florida questions people forget

Buying in Florida adds a few that don't show up on a generic list. Was this unit installed near the coast? A machine that spent a decade within a mile of saltwater in Miami, Fort Lauderdale, or along either coast can carry condenser and cabinet corrosion a Midwest unit of the same age never develops — so ask where it lived and inspect accordingly. Can it be delivered before hurricane season? Rigging crews and freight tighten from June through November, so if you need the unit running before then, confirm the schedule in writing now, not later. And is the quoted price before or after Florida sales tax, and does it include delivery and rigging? Those are frequently separate line items that quietly add thousands to what looked like a clean number.

How to read the answers

One vague answer is a question. Three vague answers is a decision. A seller who nails nameplate data, run history, and refrigerant but hedges on the rigging path is probably fine — just verify access yourself. A seller who's fuzzy on run history, can't produce a nameplate photo, and won't allow inspection is selling you risk at a discount that won't feel like a discount when the compressor fails.

The best sellers volunteer this information before you ask. When we resell a chiller we pulled during plant decommissioning, the run history and removal photos come with it because we were standing next to the machine when it came off the pad.

Bottom line

A used chiller is a great buy when you know what you're buying and a painful one when you don't. These 20 questions turn a fuzzy listing into a clear picture — and the seller's willingness to answer them tells you almost as much as the answers themselves.

Run any unit you're serious about through our used chiller buying checklist, and know the red flags before you commit. When you're ready, tell us the tonnage and brand you need and we'll give you straight answers on everything above — or if you're selling, we buy used chillers for cash.