Homeowners' pick for heating and cooling across Virginia and the Mid-Atlantic
Nothing But Cold Air
The house is cold, the thermostat says heat, and nothing is coming out of the vents. Maybe the system never kicked on last night, maybe it ran for a minute and quit. Either way you want to know if this is a five minute fix or a real repair. We do heating repair across the region, and here is the order we work through it.
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Written by the James River Heating & Air service team and checked by our field technicians
What "no heat at all" actually tells us
No heat is a different problem from weak heat. If air is moving but it feels cool, that points at a burner, heat pump or duct issue. If nothing runs at all, no fan hum, no click, then something is stopping the call for heat before it ever reaches the equipment. That is usually power, controls or a safety device doing its job. The good news is that the cheapest causes are also the most common ones. We start at the thermostat and work outward toward the furnace or air handler, because that order finds the easy problems first and keeps the expensive guessing to a minimum.
Cause family one: power and controls
This is where most no heat calls end. A tripped breaker, a blown low voltage fuse in the control board, a service switch someone flipped by the attic hatch, dead thermostat batteries or a thermostat that got bumped to cool. On older homes across our states we also find loose thermostat wire at the terminal, corroded connections in a damp crawlspace, or a condensate float switch that filled up and cut the system off on purpose. None of that is dramatic and much of it is inexpensive to correct. It is worth ruling out before anyone talks about a new furnace or a failed compressor.
Cause family two: airflow and safety lockouts
A clogged filter or a blocked return chokes airflow, the heat exchanger overheats, and a limit switch shuts the burner down. The furnace may try again a few times then lock out entirely. Same story with closed supply registers, crushed flex duct in a crawlspace, or a return grille behind furniture. On heat pumps, a snow drift, leaf pile or ice on the outdoor coil stops the outdoor unit and you get nothing but cool air indoors. These are cheap to fix and easy to prevent. If your system quit shortly after a long run on a very cold night, airflow is a strong suspect.
Cause family three: ignition, flame sensing and refrigerant
Now we are into parts. On a gas furnace, a failed igniter, a dirty flame sensor, a bad pressure switch or a stuck inducer motor will all give you a system that tries and fails. You may hear clicking or a short whoosh then silence. On a heat pump, low refrigerant charge, a failed reversing valve or a dead contactor means the outdoor unit never contributes heat. These are technician repairs. Gas, refrigerant and high voltage are not homeowner territory, and we will not walk you through them over the phone or in a guide.
What you can safely check, and what we do differently
Safe checks: put fresh batteries in the thermostat and confirm it is set to heat with the target above room temperature, look for a tripped breaker, change a dirty filter, open closed vents, and clear leaves, snow or debris from around the outdoor unit. If you smell gas or a carbon monoxide alarm sounds, leave the building first, then call 911 or your gas utility from outside, then call us. When we arrive we meter the low voltage circuit, read control board fault codes, test the igniter and flame sensor, check pressure switch operation, and measure temperature rise and refrigerant behavior. That is how we find the actual cause rather than swapping parts.
Nothing But Cold Air — straight answers
Why does my furnace start then shut off after a minute?
That short cycle usually means a safety device is stopping it. Common causes are a dirty flame sensor, a restricted filter overheating the heat exchanger, or a pressure switch reacting to a blocked flue. It needs a technician to test properly.
My thermostat screen is blank. Is that the thermostat or the furnace?
Could be either. Try fresh batteries first. If it stays blank, a blown low voltage fuse on the control board, a tripped breaker or an open furnace door switch can cut power to the thermostat. We test the circuit to find out.
Should I keep resetting the breaker to get heat back?
No. One reset is reasonable. If it trips again, something is drawing too much current and repeated resets can damage the equipment or create a fire risk. Leave it off and call us for heating repair.
How it works
- Step 1
Tell us the symptom
Call or fill in the form and describe what changed. Warm air, short cycling, a smell, water near the indoor unit. Details like that help us load the right parts before we leave.
- Step 2
We diagnose the whole system
We check the thermostat, the indoor unit, the outdoor unit and the ductwork, including runs in crawlspaces where damp air and loose joints quietly cause weak airflow and long run times.
- Step 3
You approve the fix
We explain what failed, what it takes to repair it, and what we would watch next season. Nothing gets replaced without your yes, and we clean up before we leave.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Humidity is our home groundMuggy summers and damp shoulder seasons drive most of the calls we take. We look at moisture and airflow together, not the cooling number alone, because a clammy house often means a sizing or duct problem.
- Crawlspace ducts get checkedOlder homes across the region run supply ducts through vented crawlspaces. Crushed flex, disconnected boots and soaked insulation show up constantly, and we get under the house to look instead of guessing from the register.
- Heating and cooling bothSame crew for air conditioning repair in July and heating repair in January. We know how your furnace, heat pump and air handler share ducts and a blower, so one visit covers the whole system.
- Plain talk on repair or replaceWhen a repair makes sense, we repair it. When a system is failing in ways that will keep costing you, we say so and explain why, then leave the decision with you and your timeline.
- All major brands, gas & electricCarrier, Trane, Lennox, Goodman, Rheem, York and more, as an independent company.
- Straight answersIf a system is not worth repairing, we say so, often right on the phone.
About this guide
Checked everything on the list and it still acts up?
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- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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