If you want your Goodman air conditioner to run efficiently and provide comfortable cooling throughout the warm months, it’s essential that you properly maintain its evaporator and condenser coils. Dirty AC coils block airflow and prevent heat transfer, which can greatly reduce your AC system’s cooling capacity and increase energy bills. Cleaning your Goodman coils regularly is vital for optimal performance, longevity and cost savings.
Follow this comprehensive DIY guide to learn how to thoroughly clean the coils in your Goodman central air conditioner or heat pump. With a little time and effort, you can remove built-up soil and debris to restore proper airflow and cooling power.
Why Your Goodman AC Coils Get Dirty
Goodman air conditioner coils get extremely soily for several reasons:
- Air Filters – A clogged, soily air filter allows dust, soil, pollen and other debris to bypass the filter and build up on the evaporator coils. Replacing filters monthly is crucial.
- Location – Outdoor condenser coils are vulnerable to leaves, grass clippings, cottonwood seeds and other airborne debris. Indoor evaporator coils accumulate dust and soil over time.
- Lack of Maintenance – Coils easily get caked with residue when not cleaned regularly before it turns to hardened buildup.
Signs Your Goodman Coils Need Cleaning
How can you tell if your Goodman AC coils are soily enough to cut into cooling capacity? Warning signs include:
- Higher electric bills – Dirty coils require the unit to work harder to provide cooling, using more energy.
- AC short cycling – The air conditioner turns off and on frequently but can’t keep your home comfortable.
- Ice buildup on coils – This blocks airflow; the AC may stop cooling completely until ice melts.
- Reduced airflow at registers – Poor airflow indicates a buildup of soil and debris on coils.
- Strange smells – Dirty coils can emit unpleasant odors into your home.
If you notice any of these issues, it’s definitely time to thoroughly clean your Goodman AC coils.
What You’ll Need
- Garden hose
- Spray nozzle attachment
- Coil cleaning spray solution – available at home centers
- Large bucket (or pump sprayer for condenser)
- Soft brush with long handle
- Paint scraper (optional)
- Rubber gloves & eye protection
- Drop cloths (for condenser)
Safety Precautions Cleaning AC coils involves electrical components and hazardous chemicals. Observe the following safety guidelines:
- Turn off power switch and lock out electrical panel before starting.
- Read cleaner product labels and follow all instructions and warnings.
- Never spray water or coil cleaner into electrical components.
- Take care when spraying cleaners on metal surfaces. Wear gloves and eye protection.
How to Clean Goodman Central AC Evaporator Coils
Follow these steps to safely remove soil, dust and debris from indoor evaporator coils in your Goodman central air conditioner or heat pump.
- Turn off AC power
Locate the electrical panel and main AC disconnect switch. Turn off power to the air handler to avoid electrical hazards.
- Remove access panel
Take off the metal access panel covering the evaporator coils inside the plenum. Some panels fasten with screws while others have quick-release latches.
- Inspect coils
Use a bright flashlight to carefully inspect coils for soil buildup that blocks airflow through fins. Also check the drain pan for slime accumulation.
- Attach spray nozzle to hose
Connect a curved spray nozzle attachment to your garden hose. Adjust to a wide, high-pressure spray pattern to penetrate coil fins.
- Spray coils with cleaning solution
Pour an evaporator coil cleaner into the sprayer jar according to product directions. Apply the cleaning solution evenly across all coil surfaces, keeping the spray nozzle about 8-12 inches away.
- Allow solution to soak
Let the cleaning agent soak for 5-10 minutes so it can penetrate and dissolve stubborn residue. Reapply if foam dissipates faster. Avoid electrical parts.
- Rinse coils thoroughly
Use a strong spray of water to rinse away loosened grime until all foam and cleaner residue are flushed from the AC coils. Repeat steps 5-7 for heavily soiled areas until coils look clean.
- Brush fins if needed
For extra soily spots, use a soft brush to gently comb out debris caught between fins. Don’t bend or damage delicate aluminum coil fins.
- Sanitize drain pan
Spray down the drain pan and drain tubes with coil cleaner. Let it soak 5 minutes before rinsing clean. Consider adding AC pan tablets.
- Reinstall access panel
Once coils are clean, put the metal cover back on securely. Restore power and check operation. Schedule seasonal coil cleanings to maintain efficiency.
How to Clean a Goodman Central AC Condenser
Use these methods to safely remove damaging debris and soil buildup from the condenser coils outside your Goodman air conditioner:
- Turn off power
Locate the exterior AC disconnect switch and turn off electrical power to avoid shock risk.
- Protect components
Cover any electronic control boxes and fan motors with plastic sheets to prevent water damage.
- Remove debris
Carefully clean the surrounding area first. Use a shop vac and soft brush to remove leaves, grass, cottonwood seeds and other debris.
- Spray down coils
Mix concentrated coil cleaner in a pump sprayer according to product specifications. Soak condenser coils thoroughly from top to bottom, allowing solution to penetrate soil.
- Rinse thoroughly
Let the cleaner work 5-10 minutes before rinsing. Use a strong stream of water from your garden hose to flush debris until water runs clear. Repeat if needed.
- Clean fins
For extra soily condenser coils, use a fin comb tool to gently brush out debris caught between fins.
- Restore power & check
Once outdoor unit is clean, restore electrical power and check operation. Schedule spring and fall coil cleanings.
When to Call a Goodman AC Technician
While DIY cleaning can restore cooling performance for mildly soily coils, severely neglected coils often require professional cleaning:
- Thick organic debris growth that’s difficult to remove
- Greasy residue or oil leaks from the compressor
- Corrosion damage to coils or fins
A technician has commercial-grade coil cleaners and powered sprayers to thoroughly clean coils and apply EPA-approved disinfectants if needed. They can also check for refrigerant leaks or other damage while servicing your AC system.
Keep Your Goodman Coils Clean
Now that you know how to safely clean Goodman air conditioner coils, be sure to make coil maintenance a priority. Here are some tips:
- Inspect coils seasonally – Check for soil buildup before peak cooling season.
- Change filters monthly – Prevent coil contamination year-round.
- Clean coils annually – Schedule spring professional cleanings.
- Trim foliage – Keep plants and trees away from outdoor AC unit.
By properly maintaining clean, debris-free coils in your Goodman central air conditioner or heat pump, you’ll boost efficiency, reduce operating costs and extend the service life of your cooling system.