Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateGoodman Heat Pump Service: The Marietta Owner’s Guide
Goodman heat pump service in Marietta typically runs $150 – $650 for most repairs, and we stock the most common Goodman replacement parts on our trucks for same-day fixes in many cases. When your Goodman heat pump starts short-cycling, icing up, or blowing lukewarm air in February, you’re usually looking at one of a handful of known failure points: a capacitor, a contactor, a defrost control board, a reversing valve, or a refrigerant leak. We’ve been servicing Goodman systems across Marietta since our doors opened, and we’re an independent service provider, not a Goodman corporate entity, which means we give you the straight answer on whether your part is worth replacing or whether that money belongs toward a new system.
Tell me what the system is doing, and I will tell you exactly what it needs – no guesswork, no runaround.
Which Goodman Models This Applies To
Goodman builds heat pumps across three main residential lines we see constantly in Marietta homes: the entry-level GSZ series, the mid-range GSX series, and the higher-efficiency GSZC two-stage units. The GSZ14 and GSX16 are the workhorses we service most often in neighborhoods like East Cobb, Powder Springs, and around Kennesaw Mountain. Here’s the compatibility gotcha most owners don’t know: Goodman uses different capacitor microfarad (mfd) ratings across the same model line depending on whether the unit has a single-stage or two-stage compressor. Slapping a generic capacitor into a GSZC16 because it “fit” will cause hard starts, compressor wear, and eventual burnout. We match parts by the data plate on the unit, not by guesswork.
When it comes to OEM versus aftermarket, here’s our honest position after two decades of doing this work: Goodman OEM parts are a safe bet for anything involving safeties, control boards, and the compressor circuit. For wear items like capacitors and contactors, a quality aftermarket part from a supplier like MARS or Supco often matches or exceeds OEM specs at a lower installed price. We’ll tell you which is which before we order anything, and the written price we hand you covers either way. We also carry compatible service parts for Carrier, Trane, and Lennox systems, since plenty of Marietta homes have mixed brands between upstairs and downstairs units.
Styles & brands we work with
Signs Your Goodman Heat Pump Service Is Failing
Goodman heat pumps are durable machines, but Georgia humidity and heat extract a toll. Here’s what we hear on the phone, in order of how often it turns out to be the real problem:
- Unit runs but no warm or cool air comes out. Most of the time this is a failed start capacitor or a refrigerant charge that’s leaked low. The compressor isn’t starting, or it’s running without enough refrigerant to move heat effectively.
- The outdoor unit hums but the fan won’t spin. That hum is the compressor trying to start against a dead capacitor. Letting it sit in this state burns out the compressor in weeks, not months, so don’t ignore that sound.
- Ice builds on the outdoor coil during air conditioning season. This points to a defrost control board failure or a low refrigerant charge. In Marietta’s muggy summers, a unit icing over loses efficiency fast and your energy bill shows it.
- The system short-cycles, turning on and off every few minutes. A failing contactor or a dirty condenser coil is usually behind this. Both are cheap fixes early, and both become expensive compressor replacements if ignored for a season.
- Auxiliary heat light stays on at the thermostat. On Goodman units with electric heat strips, this can mean the reversing valve is stuck or the outdoor unit has a bad temperature sensor. You’ll see the electric meter spin while the house barely holds temperature.
Replacement Cost & What’s Included
Installed Goodman heat pump parts in Marietta generally land in these ranges, parts and labor included:
| Part | Typical Installed Range |
|---|---|
| Start capacitor | $150 – $280 |
| Contactor | $150 – $300 |
| Defrost control board | $250 – $450 |
| Reversing valve | $500 – $650 |
| Full system AC repair (broader scope) | $150 – $650 |
What drives the range is the part itself, the labor to access it, and whether the repair requires recovering and recharging refrigerant. Every quote includes a written price before we open the tool bag, and the 365-Day Done Right Promise is on every repair order. If a part we install fails within a full year, we come back and make it right at no charge. That’s in writing, every time, no fine print about who did what.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
We’ll level with you: there’s one thing a homeowner can safely do, and that’s replace the thermostat batteries or check the breaker. Past that, the live 240-volt wiring inside a Goodman condenser cabinet will seriously hurt or kill you if you don’t know exactly how to discharge the capacitor before touching anything. Capacitors store voltage even after the breaker is off. We’ve seen DIY capacitor swaps where the homeowner got thrown backward off a concrete pad. That’s not a drill. The honest answer is: turn the unit off at the breaker, check the obvious, and call us at (762) 240-5599. We’ll have a real person answer, and we’ll tell you over the phone what the most likely culprit is before we even roll a truck to your Marietta street.
FAQs
Most Goodman heat pumps in Marietta last 12 to 15 years with regular maintenance. The Georgia combination of high humidity and hot summers means coils and capacitors work harder than in drier climates, so compressor failures on neglected units often happen around years 10 to 12. A twice-yearly tune-up, cleaning the coils, and keeping the drain line clear extends that lifespan meaningfully.
The honest answer is no for most failed parts. A capacitor, contactor, or control board is not repairable once it fails, it gets replaced. The only “repair” we can meaningfully perform is on something like a refrigerant line flush or a wiring repair. But replacing the right part correctly often costs less than a patch job that fails again in three weeks. Call (762) 240-5599 and we’ll tell you which category your failure falls into before you spend a dollar.
Most part replacements, including capacitor, contactor, and defrost board swaps, take 45 minutes to 2 hours once we’re on site. A reversing valve job is longer, often 3 to 4 hours because it requires recovering refrigerant, making the mechanical swap, brazing, pressure testing, and recharging. We’ll give you the time window before we show up, and the written price before we start.
Yes, our Marietta trucks carry the most common Goodman parts: capacitors in multiple mfd ratings, contactors, defrost control boards, thermostats, and motor starters. For less common parts like specific reversing valves or two-stage compressor components, we can typically have them in hand the same day or next morning from our local supply partners.
Get Your Goodman Heat Pump Diagnosed Today
If your Goodman heat pump is acting up, don’t let it limp through another Marietta season. Call Cold Harbour Heating and Air Marietta at (762) 240-5599 now. A live person answers 24/7. We’ll set a firm arrival window, hand you a written price before any work begins, and back every repair with our 365-Day Done Right Promise. If it fails within a year, we come back and fix it at no charge, guaranteed in writing. No voicemail trees. No price that changes at the door. Just a straight answer and a system that works when you need it.
Written by Victor Mancini, Owner, Cold Harbour Heating and Air Marietta at Cold Harbour Heating and Air Marietta, serving Marietta and nearby areas.