HVAC & Garage Door Troubleshooting Help
Before you call, check these common causes of AC, furnace, and garage door problems. Many issues have a simple fix — and when they don't, A Team Home Service is one call away across Salt Lake County, Utah County, and Summit County.
Safety First
The checks below are simple, safe steps any homeowner can try. If equipment looks unsafe, smells of gas, sparks, or makes a loud banging noise, stop using it immediately and call us. Do not open sealed components, touch high-voltage parts, or attempt spring or refrigerant repairs on your own.
Air Conditioning Problems
Why your AC may stop cooling or shut down — and what to check first.
Dirty or clogged air filter
A blocked filter chokes off airflow, which can cause the indoor coil to freeze and the system to stop cooling — or shut down to protect itself. Check and replace the filter first; if the problem continues after a fresh filter, call us.
Thermostat settings or low batteries
If the thermostat is set to 'heat,' the fan is on 'on' instead of 'auto,' or the batteries are low, the AC may not start. Confirm the mode is 'cool,' the set point is below room temperature, and the display is responsive.
Tripped breaker or blown fuse
A power surge or overloaded circuit can trip the breaker for the outdoor unit or indoor air handler. Check the breaker panel; if it trips again immediately after resetting, stop and call us — that points to a short or component failure.
Blocked or dirty outdoor condenser
The outdoor unit needs clear airflow to release heat. Trim back shrubs, clear debris, and make sure nothing is leaning against the cabinet. A coil clogged with dirt and cottonwood can shut the system down on a hot day.
Clogged or frozen drain line
When the condensate drain backs up, a safety float switch can shut the AC off to prevent water damage. If you see ice on the lines or water near the indoor unit, turn the system off and call us before it refreezes.
Refrigerant or mechanical problem
Low refrigerant charge, a bad capacitor, a failing contactor, or a worn compressor will stop cooling even when the unit runs. These require a licensed technician with gauges and electrical test tools — do not open the outdoor unit yourself.
Furnaces & Heating Problems
Common causes of a furnace that won't start or heat properly.
Dirty air filter
A clogged filter is the most common cause of weak heat and furnace shutdowns. It restricts airflow, which can trip the high-limit safety switch and stop the burners. Replace the filter and see if heat returns.
Thermostat or power issue
Check that the thermostat is set to 'heat,' the fan is on 'auto,' and the set point is above the current room temperature. If the display is blank, replace the batteries. Confirm the furnace switch near the unit is on.
Tripped breaker
If the breaker for the furnace has tripped, reset it once. If it trips again, do not keep resetting it — that indicates an electrical fault that a technician needs to diagnose safely.
Obstructed vent or flue
Blocked supply vents or a blocked exhaust flue can cause the pressure switch to open and shut the furnace down. Make sure furniture and rugs aren't covering return grilles, and that nothing is blocking the exterior vent.
Ignition or pilot-light problem
A failed hot surface igniter, a dirty flame sensor, or an extinguished pilot light will prevent the burners from lighting. You may hear the fan run but feel only cold air. This is an ignition-system repair — call us.
Mechanical fault
A cracked heat exchanger, bad blower motor, failed control board, or stuck pressure switch all stop the furnace from heating safely. These are internal repairs that require a qualified HVAC technician.
No heat in a Utah winter? We offer 24/7 emergency furnace service — after-hours rates apply.
Garage Door Problems
What to look for — and when to stop and call a pro.
Broken spring or cable
A broken torsion or extension spring makes the door dangerously heavy and can cause it to slam shut. A snapped lift cable tangles and leaves the door crooked. Stop using the door immediately — these are under high tension and are not a DIY fix.
Door off track
If the rollers have jumped out of the track, the door will bind, grind, or hang at an angle. Forcing it can bend the track or tear the hinges. Stop the opener and call us to re-seat the door safely.
Faulty opener or remote
If the wall button works but the remote doesn't, try fresh batteries and reprogramming. If neither works, the opener's logic board, receiver, or motor may have failed. We repair and replace all opener brands.
Misaligned safety sensors
The photo-eye sensors near the floor must point directly at each other. If one is bumped, dirty, or blocked by a leaf, the door won't close and may reverse. Wipe the lenses and check alignment before calling.
Unusual noises
Grinding, squeaking, popping, or banging usually means worn rollers, loose hardware, a dry track, or a failing gear. Noise is a warning sign — catching it early prevents a snapped cable or stripped gear.
Slow or uneven movement
If the door opens unevenly, jerks, or moves slower than usual, the springs may be fatigued, the rollers may be worn, or the opener force may be out of adjustment. We can rebalance and tune the system.
Door won't open or close fully
A door that stops short, reverses before closing, or won't open at all can be a travel-limit, force, sensor, or spring issue. Note whether it happens with the wall button or only the remote — that helps us diagnose fast.
Broken spring or stuck door? We carry common springs and parts on every truck.
Safe Checks You Can Try
These are basic, low-risk steps any homeowner can take before calling a technician. If the problem persists after these checks, it's time for a professional diagnosis.
- Set the thermostat to the correct mode (cool for AC, heat for furnace) and confirm the set point.
- Check and replace a dirty air filter — the most common cause of weak airflow and shutdowns.
- Confirm the furnace switch and the breaker for the AC or furnace are in the ON position.
- Make sure supply and return vents are open and not blocked by furniture or rugs.
- Clear debris from the outdoor AC condenser and keep shrubs trimmed back at least two feet.
- Wipe the garage door safety-sensor lenses and confirm they point directly at each other.
- Try fresh batteries in thermostats and garage door remotes before assuming a failure.
Leave These to a Technician
These repairs involve high voltage, pressurized gas, extreme spring tension, or sealed refrigerant systems. Attempting them yourself is dangerous and can cause injury or further damage.
- Do not open the outdoor AC unit or touch the capacitor — it can hold a charge even when powered off.
- Do not handle refrigerant lines or attempt to add refrigerant — federal law requires a licensed technician.
- Do not relight a furnace pilot or tamper with the gas valve or ignition system if you smell gas. Leave the home and call your gas utility, then call us.
- Do not attempt to repair or unwind garage door torsion springs or lift cables — they are under extreme tension and can cause serious injury.
- Do not force a door that is off track or binding — it can fall or bend the track.
- Do not bypass or tape over any safety switch on the furnace, AC, or garage door opener.
Stop Guessing — Get a Clear Diagnosis
If the simple checks above don't solve it, or anything looks, sounds, or smells unsafe, turn the equipment off and call us. Our certified technicians serve Salt Lake County, Utah County, and Summit County with same-day availability and 24/7 emergency service. Your $99 service-call fee is waived when you approve the repair.
Schedule a Visit
Tell us what's happening and we'll dispatch a local technician.
Online Booking Powered by Housecall Pro
Select your service, choose an available time slot, and book your service call directly with our dispatch team.
Prefer to talk to a real person?
Call (801) 999-88421-Year Parts Warranty + Free Service Call with Approved Repair
Every repair is backed by a 1-year parts warranty on installed components. Plus, your $99 service-call fee is waived when you approve the repair — you only pay for the repair work itself, not the diagnosis. If you decline the repair, the standard $99 trip-and-diagnostic fee applies.
- 1-Year Parts Warranty
- Free Service Call ($99 Value)
- Waived with Approved Repair
Mon–Fri 7AM–7PM · Saturday by appointment · Sun closed