Top-rated independent heating and cooling across central Arkansas and the Arkansas River Valley
Nothing But Cold Air
You woke up and the house is cold. The thermostat says heat, the vents are blowing nothing, or blowing air that feels like the garage. Nothing is running at all. We handle heating repair across Arkansas, Louisiana, Missouri, Mississippi, Oklahoma, Tennessee and Texas, and most no-heat calls come down to a short list of causes. Here is the order we work through them.
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Rock City Air Systems service team · field-reviewed before publishing
What "no heat at all" actually tells us
No heat at all is different from weak heat, and the difference points us somewhere. If nothing hums, clicks or spins, we are usually looking at power, controls or a safety device that has locked the system out on purpose. If the blower runs but the air is cool, the burners or the heat pump side are not making heat while the fan side works fine. Note which one you have before you call. Also note whether it quit suddenly or faded over a week. Sudden failures point to electrical and safety switches. Slow fades point to airflow, refrigerant or a burner that has been struggling a while. If you smell gas, leave the house first. Call 911 or your gas utility from outside, then call us.
Cause family one: power, thermostat and settings
This is the cheapest family and it is a real cause more often than people expect. A tripped breaker, a thermostat switched to cool or set to a hold schedule, dead thermostat batteries, or a furnace service switch someone flipped while working in the attic. On many systems there is also a door panel that has to be seated for the unit to run at all. We see plenty of no-heat calls in mid-century homes where the equipment sits in a cramped attic and a panel got left loose. A clogged filter belongs here too. Restricted airflow makes a furnace overheat and shut itself down on a limit switch, which reads to you as no heat.
Cause family two: ignition, flame sensing and safeties
On gas heat, the sequence has to complete in order or the control board stops the cycle. A weak igniter, a flame sensor coated in residue, a pressure switch that never closed because the flue or intake is blocked, or a limit switch that opened from heat build-up. You will sometimes hear the unit try three times and then go quiet. That repeated try-and-quit pattern is the board telling us where to look. These are technician repairs. Burners, gas valves and flue work are not homeowner territory, and a safety that keeps tripping is usually protecting you from something. We diagnose why it tripped rather than resetting it and walking away.
Cause family three: heat pumps, defrost and backup heat
Plenty of homes across the region run a heat pump with gas or electric backup, and no heat there looks different. The outdoor unit may be iced over, the reversing valve may be stuck in cooling, or the defrost board may have failed and left the coil packed with ice. On dual fuel systems the changeover control can fail and leave you with neither stage running. Electric backup heat has its own breakers and elements, and a failed element or sequencer means the fan runs cool air on the coldest mornings. Humidity in our region makes outdoor coils ice faster than dry climates, so defrost problems show up here more.
What you can safely check, and what we do differently
Safe for you: thermostat setting and batteries, the breaker for the furnace or air handler, a fresh filter, supply and return vents open and unblocked, and leaves or snow cleared away from the outdoor unit. That is the honest limit. Anything involving gas, refrigerant or high voltage stops there. What we bring is measurement. We read the control board fault history, check gas pressure and temperature rise, test the flame signal, meter the elements and sequencers, and check static pressure to see whether the duct run through a hot attic is choking the system. Then we tell you the actual cause instead of swapping parts. Call us for heater repair and we will work it in order.
Nothing But Cold Air — common questions
My furnace tries to start three times then stops. What is that?
That is the control board locking out after failed ignition attempts. Common causes are a weak igniter, a dirty flame sensor, or a blocked flue or intake keeping a pressure switch open. It needs a technician, not a reset.
The fan runs but the air is cold. Is that no heat?
Yes, and it narrows things down. The blower side works while the heat source does not. On gas that points to ignition or the gas valve. On a heat pump it points to the outdoor unit, defrost or backup heat.
Should I keep resetting the breaker to my furnace?
No. One reset is reasonable if it tripped once. If it trips again, something is drawing current it should not, and repeated resets risk damage or fire. Leave it off and call us for heating repair.
How it works
- Step 1
Tell us the symptom
Call or fill out the quote form and describe what the system is doing. Warm air, short cycling, water on the floor, a smell, a noise. That detail tells us what parts to load on the truck.
- Step 2
We diagnose on site
A technician checks the thermostat, the electrical side, airflow through the filter and coil, refrigerant behaviour and the ductwork. You hear what we found in plain language before anything gets replaced or repaired.
- Step 3
You approve the fix
We explain the repair, what it costs and what happens if you wait a season. Nothing gets done without your go-ahead, and we tell you honestly when a repair no longer makes sense.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- We know humid-climate systemsAcross the region the real enemy is moisture. Systems here run long hours pulling water out of the air, and that shows up as frozen coils, clogged drains and mildew smells. We diagnose for humidity, not just temperature.
- Mixed gas and heat pump workPlenty of homes we visit run a heat pump with gas backup, and the two have to hand off cleanly. We troubleshoot both sides, including defrost boards, reversing valves, ignitors and heat exchanger concerns.
- Attic ductwork is our daily breadMid-century homes often have ducts running through attics that hit brutal temperatures. Crushed runs, disconnected boots and leaking joints steal cooling before it reaches the room. We find them instead of blaming the equipment.
- Repair before replaceA capacitor, a contactor, a blower motor or a clogged drain line fixes a lot of the calls we take. We would rather fix what you have and tell you plainly when the numbers stop working.
- All major brands, gas & electricFrom Carrier and Trane to Lennox, Goodman, Rheem and Bryant, serviced independently.
- Straight answersNot worth fixing? We say that out loud, and often it saves you the visit fee.
About this guide
When the easy checks change nothing, it's time for a tech
Report what you saw during the checks and we handle the rest. A minute to book.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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