Melbourne, FL Heating System Repairs: 7 Simple Fixes

Furnace not heating or blowing cold air? You are not alone. Most no‑heat calls come down to a handful of simple issues you can check safely in minutes. Below are the seven most common causes with quick fixes, plus when to call a pro. If you need fast help in Palm Bay, Melbourne, or Merritt Island, our EPA‑certified techs can be there the same day. Ask about our Free Instant Estimate and MVP tune‑ups.

Start Here: A 60‑Second Heat Check

Before you dive in, confirm these quick items:

1. Thermostat is set to Heat, not Cool, and the fan is on Auto.
2. Target temperature is at least 3 degrees above room temperature.
3. The furnace switch near the unit is On and the breaker is not tripped.
4. Return grille is not blocked and the filter is clean.

If the furnace still will not heat, work through the seven most common issues below.

1) Thermostat Settings or Dead Batteries

Small setting mistakes create big comfort problems.

• What to check:
  1. Mode: Set to Heat.
  2. Temperature: Raise by 3 to 5 degrees.
  3. Fan: Auto for normal heating.
  4. Batteries: Replace if the screen is dim or blank.
• Simple fix: Replace AA/AAA batteries, re‑seat the thermostat on its wall plate, and wait 3 minutes for a heat call. For Wi‑Fi models, make sure the schedule is not overriding your setpoint.
• Pro tip: If you have a heat pump, look for “Aux” or “Emergency Heat.” Avoid running Emergency Heat for long periods because it is costly.

2) Tripped Breaker or Service Switch

Power interruptions are common after storms along the Space Coast.

• What to check:
  1. Main electrical panel: Reset a tripped breaker by switching fully Off, then On.
  2. Furnace service switch: Usually a light‑switch next to the unit.
  3. Outdoor disconnect: For heat pumps, make sure the pull‑out is seated.
• Simple fix: Restore power and give the system 5 minutes to start. If a breaker trips again, stop and call a pro because repeated trips signal an electrical fault.

3) Clogged or Wrong‑Size Air Filter

A dirty filter starves airflow. Furnaces then overheat and shut off on safety.

• What to check:
  1. Filter size and MERV rating match the unit’s requirements.
  2. Replace or clean filters every 30 to 60 days in Florida’s sandy, salty air.
• Simple fix: Install a fresh filter with the arrow pointing toward the furnace. After replacement, cycle power to clear some lockouts.
• Local insight: Homes near Cocoa Beach and Satellite Beach collect salt and fine sand that load filters faster. Set a calendar reminder.

4) Blocked Vents or Closed Dampers

Shut vents raise static pressure and can cause short cycling or cold rooms.

• What to check:
  1. All supply vents open at least 80 percent.
  2. Return grilles are not blocked by furniture or rugs.
• Simple fix: Open vents, clear returns, and run Heat for 15 minutes. If some rooms still lag, you may need duct balancing or zoning.

5) Flame Sensor or Igniter Issues (Gas Furnaces)

If the furnace lights and shuts off in seconds, the flame sensor may be dirty. If there is no flame at all, the igniter could be cracked.

• Safety first: If you smell gas, stop, evacuate, and call your utility or 911. Do not attempt DIY ignition repairs with a gas smell present.
• What to check:
  1. Observe the sequence through the sight glass: inducer starts, igniter glows or sparks, gas valve opens, flame proves.
• Simple fix: You can gently clean a removable flame sensor with a clean Scotch‑Brite pad and reinstall. If the igniter is cracked, it must be replaced. Many modern igniters are fragile and voltage‑sensitive, so professional service is recommended.
• Why it happens: Sensors build oxidation over time. Our 18‑point heating tune‑ups include cleaning and micro‑amp testing to prevent nuisance lockouts.

6) Clogged Condensate Drain or Pressure Switch Lockout

High‑efficiency furnaces and heat pumps create condensate. A clogged drain backs up and trips safeties.

• What to check:
  1. The condensate line near the air handler or furnace.
  2. Float safety switch position; many sit in the drain pan.
• Simple fix: Turn power Off. Remove the cleanout cap and flush with a cup of distilled vinegar. Clear the trap. Restore power and test heat.
• If issues persist: A stuck pressure switch, cracked hose, or inducer problem needs diagnostic tools to verify vacuum and combustion.

7) Leaky or Disconnected Ducts

Air you paid to heat might be leaking into the attic or crawlspace. We often find disconnected boots or long tape seams failing in older homes.

• Signs:
  1. Big temperature differences room to room.
  2. Dusty home and high energy bills.
  3. Hot or cold attic air blowing from vents.
• Simple fix: Reseat loose register boots and add temporary foil tape, not cloth tape. Schedule a pro for a full seal. Our proprietary duct sealing method delivers a superior R‑value of 4.5 per inch of thickness, is non‑toxic, fire‑rated, and provides a permanent seal that outperforms standard mastic, which has no insulating properties.

Bonus: Heat Pump Blowing Cool Air in Heat Mode

On the Space Coast, many “furnaces” are actually heat pumps. In cool, damp mornings around Rockledge and Cocoa, the outdoor unit can frost and go into defrost.

• What to expect: Steam and a temporary pause in heat during defrost is normal.
• Simple fix: Keep the outdoor coil clean and clear 2 feet around the unit. If it never warms up, the reversing valve, outdoor sensor, or charge may need service.

When to Call a Professional

Call if you notice any of the following:

1. Repeated breaker trips or burnt smells.
2. Ignition failure with gas odor.
3. Water near the furnace or air handler.
4. No improvement after the simple fixes above.

Why us:

• All technicians are nationally trained and certified by HVAC manufacturers and EPA certified.
• We back our work with an A+ BBB rating and hundreds of 5‑star reviews.
• We offer warranties as long as 12 years on select mini split and heat pump equipment from leading brands like Daikin and Mitsubishi.

Prevent Breakdowns With Pro Maintenance

Regular maintenance prevents most no‑heat calls.

• Our 18‑point heating tune‑up includes:
  1. Combustion and ignition checks.
  2. Flame sensor and burner cleaning.
  3. Electrical testing, amp draws, and safety devices.
  4. Static pressure and temperature rise.
  5. Filter fit and duct inspection.
• Ductless systems: Because they heat and cool year‑round, we recommend service twice a year for ductless mini splits.
• MVP plan: Our 12‑month Maintenance Value Plan provides priority response, can save you hundreds on repairs, and includes free service calls within limits. Important terms include a maximum of 2 free service calls per year, coverage for one unit per MVP, filters not included, and refunds only within 30 days if no work has been performed.

What It Might Cost in Brevard County

Every home is different, but here is what we typically see across Palm Bay, Melbourne, Merritt Island, and Cocoa:

• Diagnostic and safety check: Clear pricing after we test and verify faults.
• Common repairs: Flame sensors and igniters are often same‑day. Drain and float switch fixes are quick and affordable. Duct reconnections vary by access.
• Energy savings: Sealing ducts and balancing airflow often cut runtime and improve room‑to‑room comfort, which reduces wear on the furnace or heat pump.

Installation, Replacement, and Zoning Options

If your furnace is old, oversized, or keeps failing, a right‑sized replacement may be smarter than constant repairs.

• We install gas furnaces, electric heat strips, heat pumps, and ductless mini splits.
• We design zoning and duct balancing for precise room control. Where zoning is not compatible, we use ductless mini splits to solve hot‑cold spots without tearing into existing ducts.
• New system installs include a complimentary 12 months of our MVP plan.

Compliance, Safety, and Credentials You Can Trust

• EPA‑certified technicians perform 18‑point tune‑ups and repairs.
• We are Accredited and A+ rated with the BBB.
• Licenses: HVAC CAC1818633, Plumbing CFC1432297, Electric EC13014915.
• Our proprietary duct sealing is non‑toxic, fire‑rated, and insulates to R‑4.5 per inch for a permanent seal.

Quick DIY Checklist Recap

1. Thermostat mode Heat, batteries fresh, fan Auto.
2. Breaker and furnace switch On.
3. Clean, correctly sized air filter.
4. Open vents and clear returns.
5. No gas smell. If present, evacuate and call the utility or 911.
6. Clear condensate trap with vinegar if backed up.
7. If in doubt, schedule a diagnostic to protect your system and warranty.

Special Offers for Space Coast Homeowners

• Free Instant Estimate on heating system service or replacement. Expires 2026-10-07.
• Complimentary 12 months of our Maintenance Value Plan with every complete new system installed. Expires 2026-10-07.

Call (321) 345-3415 or schedule at https://climateexpertsac.com/ and mention “Free Instant Estimate” to lock in your savings today.

What Homeowners Are Saying

"Shawn did an amazing job diagnosing and solving a problem on a 3 year old Lennox furnace that has done nothing but give us problems... I was so happy I signed up for the yearly maintenance and service with Climate Experts!... Highly recommend this company"
–Shawn’s Customer L., Furnace Repair

"GREAT job by all of Climate Experts Tommy Head, Connor Kaminski, & Jean Medina Calderon & teams. They removed and installed the old furnace and AC unit plus installed a Heat Pump... Certainly a 5-star performance by all."
–Tommy H.’s Customer C., System Install

"Blake and Caleb installed a new Daikin system today and they were 5 star all the way!... I highly recommend Climate Experts for their staff knowledge, expertise and top quality product line with exceptional customer relations."
–Blake C.’s Customer R., Daikin Install

"Highly recommend Climate Experts. ... He provided 6 detailed quotes... and some air duct replacement work... Owen provided 5 star service and we highly recommend Climate Experts for your heating and cooling needs."
–Owen S.’s Customer M., Ductwork & System Options

Frequently Asked Questions

Why is my furnace running but not blowing hot air?

Thermostat mode, dirty filters, or a tripped float switch often cause this. Set to Heat, replace the filter, clear the condensate trap, and try again. If there is no improvement, schedule a diagnostic.

How often should I service my heating system in Florida?

Have a furnace or heat pump checked once a year. Ductless mini splits should be serviced twice a year because they run for both heating and cooling.

Is it safe to clean a flame sensor myself?

If you are comfortable and there is no gas smell, a gentle polish can help. Turn power off first. For cracked igniters, wiring issues, or any gas odor, call a professional.

Do closed vents save money?

No. Closed vents raise duct pressure and can cause short cycling and leaks. Keep supply vents open and returns clear for proper airflow.

What brands do you service or install?

We service all major makes and install leading brands including Daikin and Mitsubishi, with select warranties up to 12 years when registered properly.

Bottom Line

If your furnace is not heating, start with thermostat settings, power, filters, vents, the flame sensor, condensate drain, and duct leaks. Most issues have simple fixes. For persistent problems in Palm Bay, Melbourne, Merritt Island, Cocoa, Rockledge, or nearby, we can help the same day. Search “furnace not heating Space Coast” and choose Climate Experts for fast, honest service.

Ready for Heat Again?

Call (321) 345-3415 or book at https://climateexpertsac.com/. Use our Free Instant Estimate before 2026-10-07. Installing a new system? Get a complimentary 12 months of our MVP maintenance plan. Stay warm, save money, and relax knowing certified pros have your back.

About Climate Experts Air, Plumbing & Electric

We are a locally owned, award‑winning HVAC, plumbing, and electrical team serving the Space Coast. Our technicians are manufacturer trained, EPA certified, background checked, and drug tested. We hold an A+ BBB rating and offer warranties up to 12 years on select equipment. We operate a real training facility and are certified for RSES and NATE testing. Licenses: HVAC CAC1818633, Plumbing CFC1432297, Electric EC13014915. We also provide 24/7 live phone support.