HVACDIAGNOSTIC
Problem Cluster

AC Making Noise

Loud noise, buzzing, rattling, squealing, humming. Noise complaints drive a lot of service calls.

Symptoms in This Cluster

Strange Noises from HVAC

Banging, whistling, or grinding sounds coming from your heating or cooling system.

Full Diagnostic Guide →
Condition Variations
Strange Noises from HVAC but Unit RunningStrange Noises from HVAC Intermittent

Noisy Outdoor Condenser

Loud buzzing, rattling, or clicking from the outdoor HVAC unit.

Full Diagnostic Guide →
Condition Variations
Noisy Outdoor Condenser but Unit RunningNoisy Outdoor Condenser in Extreme HeatNoisy Outdoor Condenser Intermittent

HVAC Clunking Sound

A heavy, irregular sound coming from the metal casing of your indoor or outdoor unit.

Full Diagnostic Guide →

Burning Smell from HVAC

The scent of burning plastic or electricity when the system is running.

Full Diagnostic Guide →

Related Clusters

AC Not CoolingAC Freezing UpAC Short CyclingAC Running ConstantlyRefrigerant Problems
← Back to air conditioning