HVAC Field Reference
Quick-Access Symptom Database:
AC Blowing Warm
Primary Indicator: Is the outdoor unit fan spinning?
Fan Not Blowing
Primary Indicator: Set thermostat fan to "ON". Does it blow?
Unit Frozen
Primary Indicator: Is the air filter dirty?
Water Leak
Primary Indicator: Is the primary drain line dripping outside?
Loud Noise
Primary Indicator: Is it a metallic screeching sound?
Furnace No Heat
Primary Indicator: Does the small inducer fan start up?
Short Cycling
Primary Indicator: Does it run for less than 2 minutes?
Thermostat Blank
Primary Indicator: Check the float switch at the indoor unit. Is it full of water?
Burning Smell
Primary Indicator: Is it the first time turning on heat this season?
High Bills
Primary Indicator: Is the "Emergency Heat" light on thermostat?
Field Data / Spec: