The dirty-sock smell in a Westchester hallway, and the maintenance visit that ends it

The smell in the hallway

The house is a 2004 two-story in Westchester, north of Millhopper Road, on a pond lot with a community pool down the street. The heat pump is the second one the house has had; it went in around 2016. The owner has never had it serviced, because it has never broken.

What she is smelling is biofilm on the indoor coil. Five months of running wet in a Gainesville summer, with the pond’s humidity and the oak canopy’s pollen pulled through the return, leave the coil coated. When heating season starts and the coil warms for the first time, the bacteria release the odor that heat pump technicians everywhere call dirty sock syndrome. It is harmless to the equipment and unpleasant to live with, and it almost never appears in a system that gets a spring coil cleaning.

That smell is a maintenance call, not a repair. But the visit it triggers is also the moment a technician gets to look at a ten-year-old heat pump properly for the first time, and that is where the real decisions get made.

The decision tree we walk on every maintenance visit

Maintenance is not only cleaning. A Gainesville heat pump works year-round, which means every visit is a chance to answer the question the owner is quietly asking: keep spending on this one, or start planning for the next one?

1. How old is it, and what refrigerant? - Under ten years, R-410A or newer: maintain and move on. Everything below is routine. - Ten to fifteen years: maintain, but start logging readings against last visit. Rising compressor amperage and falling capacitance are the early warnings. - Over fifteen, or any R-22 unit: maintain, and have the replacement conversation in the abstract now, so it is not a crisis later.
2. What do the readings say? - Charge correct, amperage within rating, capacitors within tolerance: keep. - One component drifting: repair that component, keep the system. - Low charge with a leak at the coil on a unit past twelve years: the repair-or-replace fork. We put both numbers in writing.
3. Is the house comfortable? - A system that keeps the setpoint and holds humidity below 55 percent in August is doing its job regardless of age. - A system that cannot, after a tune-up, is undersized, duct-starved or worn out, and we tell you which.
4. What is the repair history? - Two component failures in three years on an older unit tend to come in threes.
5. What does the owner want? - A Blues Creek retiree planning to sell in two years and a Haile Plantation family planning to stay twenty get different advice from the same readings.

The honest outcome of most visits is “keep, and see you in six months.” The honest outcome of some is “keep, and here is what the next one would cost so you can plan.” We would rather you plan than panic.

What the visit includes

• Filter replaced, size and MERV rating recorded.
• Indoor coil inspected and cleaned when access allows; drain pan, trap and line flushed; float switch tested or recommended.
• Outdoor coil rinsed from the inside out, debris cleared from the base. Under Gainesville’s canopy that is leaves, acorns and pine straw every single time.
• Refrigerant pressures and line temperatures measured and compared to the nameplate chart.
• Capacitors, contactor, relays, defrost board and sensors tested; strip heat and sequencers energized and amperage checked.
• Reversing valve operation verified in both modes.
• Blower wheel inspected, motor amperage recorded.
• Thermostat settings reviewed, especially the backup-heat behavior that quietly inflates winter bills.
• Written report, with readings, left with you.

Schedule a heat pump tune-up

Brands we maintain

Cook’s is a Lennox dealer, and Lennox heat pumps are what we install. Maintenance is brand-blind. Across Gainesville’s neighborhoods we service:

Brand family	Where we tend to find it
Lennox	Newer installs, Oakmont, Town of Tioga, replacement systems citywide
Carrier and Bryant	1990s and 2000s Haile Plantation, Blues Creek, Westchester
Trane and American Standard	Northwest Gainesville 1980s homes and later replacements
Goodman, Amana, Rheem, Ruud	Student rentals, landlord replacements, east-side homes
Package heat pumps, any brand	Older single-story homes, manufactured homes toward Archer and Hawthorne, apartment complexes
Ductless mini-split heat pumps	Garage conversions and accessory units near campus

Warranty notes worth knowing

Manufacturer parts warranties on heat pumps usually require two things to stay valid: registration within a window after installation, and documented annual professional maintenance. A skipped year can cost you a compressor claim. If you bought the house with the system in it, the warranty may have transferred at reduced length or not at all; bring the paperwork or the model and serial numbers to the first visit and we will tell you where you stand. Our maintenance reports are written so they serve as that documentation.

Paying for it

Maintenance is a per-visit charge or part of an agreement; either way the price is stated before we arrive. When the decision tree ends at replacement, Cook’s gives a free estimate on a new Lennox heat pump and offers financing paid monthly, discussed in person. Clay Electric co-op members outside the GRU footprint have a heat pump rebate available through their utility, and GRU customers can book an energy survey through the city. Cook’s standing as a contractor under those programs is a question for the owner. [[CONFIRM WITH JERRY]] No federal credit applies to equipment installed after 2025.