Ac compressor constantly running
AC compressor constantly running? Sort fan settings, filter airflow, condenser coil dirt, and weak cooling signs before guessing at compressor parts.
HVAC • RepairRiot
Air Conditioner Troubleshooting & Repair Guides
Find the cooling, airflow, drain, noise, or outdoor-unit symptom before replacing parts or calling for service.
Check AirflowCheck The Outdoor UnitWatch For Ice
Featured air conditioner guides
Air conditioner cools slowly after filter change
If AC cools slowly after a filter change, check filter direction, size, MERV restriction, return airflow, ice, and condenser airflow before buying parts.
Air conditioner evaporator coil freezing up
AC evaporator coil freezing up? Thaw safely, check filter airflow, return grilles, blower clues, drain water, and refrigerant stop points before parts.
Ac fan stays on auto
AC fan stays on in Auto? Put the fan in Auto, turn off circulate schedules, time the off-delay, and stop before air-handler electrical checks.
Ac outdoor fan slow
AC outdoor fan running slowly? Shut cooling off, check blade drag and a dirty condenser coil, then stop before capacitor or fan-motor guesses.
Ac outdoor unit clicks repeatedly
AC outdoor unit clicks repeatedly? Check thermostat demand, filter, condenser airflow, breaker, and disconnect before capacitor or contactor guesses.
More air conditioner problems
Air conditioner outside unit rattling
Outdoor AC unit rattling only when the fan runs? Sort loose panels, grille debris, fan blade trouble, motor noise, pad vibration, and stop-now clues.
Air conditioner outside unit vibrating
Outdoor AC unit vibrating on startup or while running? Sort loose panels, pad movement, fan imbalance, line-set contact, and stop-now compressor clues.
Ac restarts every few minutes
AC restarts every few minutes? Time the cycle and check filter airflow, vents, condensate safety, thermostat behavior, and outdoor unit clues.
Air conditioner blower runs but not cold
AC blower runs but not cold? Check thermostat demand, filter airflow, ice, outdoor condenser operation, and drain safety before buying parts.
Air conditioner blower stays on after cooling cycle
AC blower stays on after the cooling cycle? Check fan AUTO, circulation schedules, normal blower delay, and thermostat clues before buying parts.
Air conditioner blowing warm air
Air conditioner blowing warm air? Check thermostat settings, filter airflow, ice, outdoor condenser operation, and coil condition before refrigerant guesses.
Air conditioner breaker trips in afternoon
AC breaker trips in afternoon? Check filter airflow, condenser coil dirt, heat load, and repeated-trip stop points before blaming the compressor.
Air conditioner electrical buzzing noise
If your air conditioner is buzzing, sort safe fan, cabinet, cooling, breaker, and indoor-filter clues before guessing at hidden electrical parts.
Air conditioner clicking noise
Air conditioner clicking noise? Separate one normal startup click from repeated clicking, thermostat calls, loose panels, debris, and no-start clues.
Air conditioner compressor not turning on
AC compressor not turning on? Check thermostat demand, breaker, disconnect, filter airflow, condensate safety, and no-start clues before buying parts.
Air conditioner compressor runs constantly
If your AC compressor runs constantly, check thermostat demand, filter airflow, condenser coil dirt, heat load, and stop points before buying parts.
Air conditioner cools downstairs not upstairs
AC cools downstairs but not upstairs? Check filter airflow, upstairs registers, return air, thermostat location, and duct dampers before refrigerant guesses.
Air conditioner cools at night not day
If AC cools at night but not during the day, check filter airflow, condenser coil dirt, thermostat schedule, sun load, and service stop points.
Air conditioner dripping water inside
If your AC is dripping water inside, check condensate drain clogs, drain pan water, filter airflow, coil ice, and float switch clues before buying parts.
Air conditioner drips only at night
Air conditioner drips only at night? Separate outdoor condensation from indoor drain, airflow, ice, and vent-sweat clues before buying parts.
Air conditioner fan not spinning
Air conditioner fan not spinning? Identify indoor vs outdoor fan trouble, then check thermostat, filter, breaker, debris, and no-start stop points.
Air conditioner fan runs constantly
Figure out why your air conditioner fan keeps running. Start with thermostat fan settings, then check cooling performance, airflow, and drain-related shutdown clues before replacing anything.
Air conditioner frozen coil
A frozen AC coil usually points to low airflow, a dirty filter, a blower problem, or a refrigerant issue. Start with thawing it safely, then check the simple causes before calling for service.
