ProblemA musty or mold smell comes from the vents when the AC runs. Possible CausesMold in ductworkDirty evaporator coilClogged condensate drainExcess moisture in the system How To Fix ItReplace the air filterClean vent coversRun the system fan to circulate airInspect drain line for clogs When To Call A ProfessionalPersistent mold smells may require professional coil…
ProblemThe thermostat display is blank or not responding. Possible CausesDead thermostat batteriesLoose wiringTripped breakerFaulty thermostat How To Fix ItReplace thermostat batteriesCheck the breaker panelReset the thermostatEnsure wiring connections are secure When To Call A ProfessionalIf the thermostat remains blank after replacing batteries, it may need replacement.
ProblemThe outdoor AC fan blade appears bent and may cause vibration. Possible CausesDebris hitting the fanPhysical damageImproper installationMotor vibration How To Fix ItTurn off power to the outdoor unitInspect the fan blade for damageRemove debris from the unitAvoid running the AC if the blade is severely bent When To Call A ProfessionalA damaged fan blade…
ProblemThe AC unit produces a high pitched noise while running. Possible CausesFan motor issuesLoose internal componentsRefrigerant pressure problemsWorn bearings How To Fix ItTurn off the AC systemInspect the outdoor unit for debrisRestart the system briefly to identify the noise source When To Call A ProfessionalA high pitched noise may indicate a failing motor or compressor…
ProblemDust blows out of the vents when the AC system runs. Possible CausesDirty air filterDust inside ductworkDirty ventsClogged return air vent How To Fix ItReplace the air filterClean vent coversVacuum around ventsInspect return vents for dust buildup When To Call A ProfessionalIf dust continues blowing from vents, duct cleaning may be required.
ProblemThe AC system struggles to cool the garage even though other rooms feel comfortable. Possible CausesPoor insulationBlocked ventsDuctwork restrictionsHigh outdoor heat entering the garage How To Fix ItEnsure vents in the garage are openCheck airflow from the ventClose garage doors and windowsImprove insulation if possible When To Call A ProfessionalIf airflow is weak or nonexistent,…
ProblemThe AC unit turns on but shuts off shortly after starting. Possible CausesDirty air filterThermostat malfunctionCompressor overheatingElectrical issue How To Fix ItReplace the air filterCheck thermostat settingsAllow the system to cool downRestart the system and monitor operation When To Call A ProfessionalIf the AC continues stopping shortly after starting, a technician should inspect the compressor…
ProblemThe AC system randomly shuts off and then starts working again. Possible CausesLoose electrical connectionThermostat malfunctionCircuit breaker issueFaulty capacitor How To Fix ItCheck the breaker panel for trippingInspect thermostat batteriesRestart the HVAC systemListen for unusual sounds from the outdoor unit When To Call A ProfessionalIf the system continues losing power, an HVAC technician should inspect…
ProblemWeak airflow from vents occurs because several vents in the home are closed. Possible CausesClosed or blocked ventsAir pressure imbalanceRestricted airflow through ductsFurniture blocking vents How To Fix ItOpen all vents in the homeMove furniture away from ventsCheck air filter conditionEnsure proper airflow throughout the house When To Call A ProfessionalIf airflow remains weak after…
ProblemThe thermostat is set to cooling but the AC system does not respond. Possible CausesDead thermostat batteriesFaulty thermostat wiringHVAC control board issuePower interruption How To Fix ItReplace thermostat batteriesCheck the breaker panelReset the thermostatConfirm thermostat is set to cooling mode When To Call A ProfessionalIf the system still does not respond, an HVAC technician should…