Decatur, GA Heat Pump Not Blowing Hot Air? HVAC Fixes

Estimated Read Time: 12 minutes

A heat pump that will not blow hot air on a cold morning is frustrating. If you searched how to troubleshoot a heat pump that’s not blowing hot air, you are in the right place. Below are safe, simple checks any homeowner can do before calling for service. If you need help, Bardi offers same-day repairs across Greater Atlanta.

Quick Safety and When to Call

Before you start, switch off power at the thermostat or breaker if you will remove panels or touch wiring. If you smell burning, hear arcing, or see ice choking the outdoor fan, stop and call a pro. Bardi provides same-day diagnostics and a 5-year repair warranty on parts we replace.

• Electrical smells or tripped breakers that will not reset require a technician.
• Heavy ice on the outdoor unit can damage the fan or coil if forced.
• Repeated short cycling often points to a control or refrigerant issue.

Step 1: Confirm Thermostat Settings

Many no-heat calls start at the thermostat. Make these checks in order:

1. Mode should be Heat, not Cool or Off.
2. Fan should be Auto. Constant On can push room-temperature air.
3. Setpoint should be at least 3 degrees above current room temp.
4. If you see “Aux” or “Emergency Heat,” that is normal in very cold weather. If Aux never engages, a setting or wiring issue may exist.

If you recently installed a smart thermostat, confirm the heat pump type is selected and the reversing valve setting matches your system. Bardi installs and configures Nest and Ecobee to prevent these mix-ups.

Step 2: Check Airflow Inside the Home

A heat pump needs clear airflow to move heat. Poor airflow makes supply air feel cool.

• Replace or clean the air filter. If you live near Atlanta’s heavy spring pollen, filters clog fast. Start with a fresh filter.
• Open all supply registers and returns. Avoid blocking with furniture or rugs.
• Check doors to bonus rooms and basements. Closing them can starve return air.

Weak airflow after a new filter can indicate a failing blower motor, matted indoor coil, or duct leak. Duct cleaning and coil cleaning are part of our tune-ups when needed.

Step 3: Inspect the Outdoor Unit

The outdoor unit is where your heat pump gathers heat, even in cold weather.

• Look for leaves, pine straw, and red clay mud around the base. Atlanta rains can splash clay into the coil. Clear debris within 2 feet of the cabinet.
• Gently rinse the coil with a garden hose from the inside out if accessible. Do not use high pressure.
• Confirm the top fan spins when the system runs. A still fan with a humming sound can mean a failed capacitor or motor.

If the coil is packed with ice, your unit may be in defrost mode or may have a defrost fault.

Step 4: Understand Defrost Mode vs. Real Problems

Your heat pump will sometimes blow room-temperature air while the outdoor unit defrosts. This can last 5 to 10 minutes and may happen more on humid, cold days.

Signs it is normal defrost:

• Steam rises from the outdoor unit.
• The outdoor fan stops briefly while the compressor runs.
• Heat returns after a short period.

Signs of a fault:

• Thick ice builds again within an hour.
• Defrost seems to run constantly.
• Supply air never feels warm, and Aux heat does not engage.

These patterns point to a sensor issue, control board failure, or low refrigerant. A licensed technician should test and repair.

Step 5: Breakers, Switches, and Float Safety

A tripped or off switch can stop heat without obvious signs.

• Verify the indoor air handler breaker and the outdoor heat pump breaker are both on. Some homes use separate breakers.
• Check the service switch near the indoor unit. It looks like a light switch. Make sure it is on.
• Look for a full condensate pan and a tripped float switch. If your drain is clogged, the safety device will cut power to protect your home. Drain service is included in our multi-point tune-up.

If a breaker trips again after reset, call for service. Persistent trips mean an electrical fault.

Step 6: Listen for the Reversing Valve

The reversing valve changes the flow of refrigerant between heating and cooling. If it sticks, you will not get heat.

• Switch from Heat to Cool for 2 minutes, then back to Heat. Listen for a clear whoosh or change in tone.
• No change in sound can indicate a valve or control issue that needs a pro.

Good news: many control-related repairs are quick. Bardi backs repairs with a 5-year warranty on parts we replace.

Step 7: Evaluate Supply Air Temperature

Heat pump supply air is gentler than a gas furnace. In mild weather, it may feel cool to your skin but still heat the home.

• Use a simple thermometer at a supply vent and at a nearby return. A 15 to 25 degree rise in Heat mode is typical in moderate conditions.
• If the rise is under 10 degrees, you may have low refrigerant, a dirty coil, or a weak compressor.

These tests guide the next step: professional diagnostics.

Step 8: When Auxiliary or Emergency Heat Should Run

Aux heat supports the heat pump on very cold nights. If your home never reaches setpoint and Aux does not appear, check these:

• Thermostat configuration for heat pump with electric Aux.
• Breaker to the electric heat strips.
• Recent utility work or storms that may have tripped a breaker.

If Aux runs all the time, expect higher bills. That points to low refrigerant, airflow limits, or an outdoor unit fault. An $88 diagnostic from Bardi locates the cause. Members pay $68.

Step 9: Common Issues Only a Pro Should Handle

Some problems require gauges, meters, and certification.

• Refrigerant leaks or low charge.
• Defrost board or sensor failures.
• Failed compressor or outdoor fan motor.
• Severely matted indoor or outdoor coils that need chemical cleaning.

Bardi’s NATE-certified team handles these repairs the same day in most cases. If your system is old or out of warranty, we offer next-day installation with a 10-year parts and labor warranty on new systems and guidance on tax credits up to $2,000 for qualifying models.

Prevent Problems With Pro Maintenance

Routine maintenance is the easiest way to keep warm air flowing.

What a tune-up includes:

• Coil cleaning
• Electrical testing
• Refrigerant and airflow checks
• Drain service
• Safety controls
• Thermostat calibration

Our multi-point system tune-up is a customer favorite at $79.99. Friends of Bardi members get three annual visits, priority scheduling, special discounts, extended warranties, and a 100% satisfaction guarantee.

Should You Repair or Replace?

Use these quick guidelines:

1. Age and cost: If your heat pump is 12 to 15 years old and needs a major part, consider replacement.
2. Comfort: Frequent cold spots or long run times suggest sizing or duct issues. A new system with a smart thermostat can fix both.
3. Efficiency: New high-efficiency models can qualify for rebates up to $1,800 plus a federal tax credit up to $2,000. Financing often starts at 0% APR.

Bardi offers free in-home consultations to size the right system and lay out clear options. Many new installs include a smart Wi-Fi thermostat.

Step-by-Step Quick Checklist

1. Set thermostat to Heat and Auto. Raise setpoint by 3 degrees.
2. Replace the air filter. Open all vents and returns.
3. Clear debris around the outdoor unit. Look for ice.
4. Check indoor and outdoor breakers and the furnace switch.
5. Measure supply and return temperatures for a 15 to 25 degree rise.
6. If issues persist, schedule a diagnostic. Same-day service is available.

Local Insight for Metro Atlanta Homes

• Spring pollen can clog filters and outdoor coils fast. Check filters monthly March through May.
• After heavy storms, Atlanta red clay can splash into the outdoor coil fins. A gentle rinse helps.
• Many older homes around Marietta and Decatur have undersized returns. We can add return air to improve heat output and reduce noise.

What to Expect From a Bardi Service Visit

• Transparent pricing: $88 diagnostic, $68 for members. Typical repair costs start at $128.
• Skilled people: NATE-certified technicians trained through Bardi University.
• Strong guarantees: 5-year repair warranty, Lifetime Installation Workmanship Guarantee, and our Best Price Guarantee on new systems.
• Speed: Same-day repairs and next-day installations.
• Financing: Quick approvals, no prepayment penalties, and options from 12 to 180 months, with rates starting at 0% APR for qualified buyers.

Ready to stay warm? We are a call away and online 24/7 to schedule.

Special Offers for Heat Pump Owners

• Free Consultation for Heat Pump Installation or Service. Redeem online or by phone before 2026-02-04.
• Current Deals: Up to $1,800 in manufacturer rebates on select high-efficiency heat pumps.
• End-of-Season Sale: Up to $3,200 off select systems. Special financing available.
• Federal Tax Credit: Up to $2,000 on qualifying high-efficiency models. Eligibility applies.
• Tune-Up Special: Multi-point heating and cooling system tune-up for $79.99.

Call (678) 201-1668 or visit https://bardi.com/ to claim an offer when you schedule.

What Homeowners Are Saying

"Bardi was solid from start to finish... Daniel R. came out to help fix an issue with my heat pump system... I signed up for their maintenance plan... he explained what he was doing in detail, tuned up and made sure other parts of the heat pump system were working correctly. I’m still kind of stunned."
–Beau B., Greater Atlanta

"Update- I went with Bardi for the mini split system. The installation went great and the guys were very friendly and answered my questions and took time do do the install very nicely."
–Dave R., Mini Split Installation

"Julian Evan was very thorough in checking my heat pump. Great personality. Appreciate you!"
–Cathy G., Heat Pump Service

Frequently Asked Questions

Why does my heat pump blow cold air in heat mode?

Heat pump air feels cooler than furnace air. During defrost, it may blow room-temperature air briefly. If air stays cool and Aux heat never engages, you likely need service.

How long should defrost mode last?

Most cycles last 5 to 10 minutes in humid, cold weather. If ice returns quickly or defrost runs often, a sensor or board may be failing. Schedule a diagnostic.

What temperature rise should I see at the vents?

Measure return and supply. A 15 to 25 degree rise is common. Under 10 degrees suggests low refrigerant, dirty coils, or airflow problems.

Is it safe to remove ice from my outdoor unit?

Turn the system off and let ice melt. Do not chip ice with tools. If heavy ice returns, call a pro to inspect the defrost system and refrigerant charge.

When should I replace instead of repair?

If the unit is 12 to 15 years old and needs a major part, consider replacement. New systems carry 10-year warranties and may qualify for rebates and tax credits.

The Bottom Line

Most issues when a heat pump is not blowing hot air are simple: thermostat settings, airflow, or defrost. Use the checklist above. If the problem continues, we can help the same day. For upgrades, we offer next-day installs and 10-year warranties.

Choose Bardi for how to troubleshoot a heat pump that’s not blowing hot air in Atlanta and nearby cities.

Ready for Warm Air Again?

• Call now: (678) 201-1668
• Schedule online: https://bardi.com/
• Mention our Free Consultation and ask about up to $1,800 rebates, up to $3,200 off select systems, and the $2,000 federal tax credit.

Book your diagnostic or consultation today. Stay warm, save money, and get it done right the first time with Bardi.

About Bardi Heating, Cooling, Plumbing, Electrical

Bardi has served Greater Atlanta since 1989 with NATE-certified technicians and 24/7 service. We offer same-day repairs, next-day installations, and a 100% Satisfaction Guarantee. New systems carry a 10-year parts and labor warranty. We are BBB Torch Award winners and a 2023 AJC Top Workplace. Ask about our Best Price Guarantee and Friends of Bardi membership for priority care.