HVAC Recovery Guides
Find the next recovery step for hvac repair problems.
Guides:18
Common HVAC Problems
- airAir Vent Blowing Musty Smell When Heat or AC Kicks OnA musty sock smell from your vents means mold or bacteria in the ductwork or on the evaporator coil. Clean it before you're breathing it all winter.chevron_right
- mode_fanFurnace Blower Won't Stop Running? The Limit Switch or Thermostat Fan Is StuckYour furnace blower keeps blowing cold air 24/7 and won't shut off. The fan limit switch is stuck or the thermostat fan setting is on ON instead of AUTO — two free fixes.chevron_right
- thermostatThermostat Screen Black and Blank? Check Power Before You FreezeA completely dead thermostat screen usually means power loss — not a dead unit. Check the batteries, breaker, and float switch before you buy a new thermostat.chevron_right
- ac_unitAC Running but Not Blowing Cold? The Capacitor or Contactor Is ShotYour outdoor AC unit hums but the air from the vents is warm. The run capacitor has failed — a $15 part that kills cooling when it dies. Fix it in 20 minutes.chevron_right
- local_fire_departmentFurnace Won't Ignite — No Heat When Thermostat CallsWhen the thermostat clicks on but the furnace never fires, the problem is usually the igniter, flame sensor, or gas valve. Start with the simplest fix.chevron_right
- water_damageWater Heater Leaking from the BottomWater pooling under your water heater usually means a rusted tank or failed drain valve. Identify the source fast before the leak gets worse.chevron_right
- water_pumpSump Pump Runs but Won't Pump Water OutA sump pump that hums or runs but doesn't move water has a clogged intake, stuck impeller, or broken check valve. Fix it before the next storm hits.chevron_right
- mode_heatRadiator Hot at Top but Cold at the BottomA radiator that's hot on top and cold at the bottom is full of sludge. Bleed it first, but you'll likely need to flush the system to get real heat back.chevron_right
- mode_heatElectric Baseboard Heater Only Warm on One EndAn electric baseboard heater that's hot at one end and cold at the other has a bad element or a failed internal connection. Diagnose it without calling an electrician.chevron_right
- thermostatThermostat Won't Turn On the AC or HeatA thermostat with no display or response is usually a dead battery, tripped float switch, or blown fuse at the air handler. Start with the free fixes.chevron_right
- water_dropAC Unit Leaking Water Inside the HouseWater dripping from your indoor AC unit is usually a clogged condensate drain line. Clear it in 15 minutes with a wet/dry vac before the water damages your ceiling or floor.chevron_right
- ac_unitAC Unit Copper Lines Covered in IceIce on the copper refrigerant lines means your AC is starving for airflow or low on refrigerant. Fix the easy stuff before you call for a recharge.chevron_right
- repeatFurnace Short Cycling — Turns On and Off Every Few MinutesA furnace that kicks on and off every few minutes is overheating or misreading conditions. Find the restriction before the heat exchanger cracks from the stress.chevron_right
- volume_upWater Heater Making Rumbling or Popping NoisesA rumbling or popping water heater means sediment has built up on the bottom. Flush it out before the tank overheats and cracks from the stress.chevron_right
- water_dropWater Heater Discolored or Rusty Hot WaterBrown or rusty hot water from every tap means your water heater is rusting internally. Pinpoint whether it's the tank or the pipes before you replace the wrong thing.chevron_right
- heatingBaseboard Heater Stays Cold When the Heat Is OnA cold baseboard heater while other rooms are warm means trapped air or a stuck zone valve. Bleed it right so heat flows again without flooding the floor.chevron_right
- ac_unitRadiator Cold at the Top? Bleed the Air Out in 5 MinutesA radiator that's hot at the bottom and cold at the top has trapped air, not a boiler problem. Bleed it with one key and restore full heat without a service call.chevron_right
- airOne Room's Air Vent Blowing Weak While Others Blast ColdA room with barely any airflow while the rest of the house is comfortable usually points to a damper issue or a disconnected duct — not a system failure.chevron_right