Troubleshooting
Please check our list below to troubleshoot any issues you may be experiencing with your cooling or heating unit.
Your heating and air conditioning unit will not warm or cool your home properly without balance in the HVAC air flow. If your home has uneven temperatures from room to room, you need to balance the air flow in your HVAC system.
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- Leaking Air Ducts – In Seams
- Air Flow Loss in Registers in Home
- Home lacks even air flow – even temperature
- Air Ducts/Supply & Returns not Plentiful Enough
- Poor Sizing of Original Equipment
Common Problems
Air filtration systems work to capture pollutants and contaminants in the air.
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- Lack of maintenance
- Too long in between filter changes
What can cause this to fail?
Uses ultraviolet light to kill Microorganisms (mold, mildew, bacteria, and viruses).
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- Improper Air Flow Over Bulb
- Restricted Filters
- Age of Bulb
What can cause this to fail?
Protects the furnace and cleans the air circulating through the house.
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- Age and simple deterioration of material
- Duct leaks
- Has not been changed
- May not provide adequate air filtering?
What can cause this to fail?
Used to circulate conditioned air (whether heated or cooled)
from a furnace or cooling system throughout the home.
What can cause this to fail?
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from a furnace or cooling system throughout the home.
What can cause this to fail?
- Age of Part
- Dirt/Debris
- Electrical Short/Surge
- Vibration – out of balance
Powers the blower fan.
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- Age of Part
- Out of Balance blower wheel
- Dirt and Debris – stressed motor
- Worn motor bearings, lubrication
- Surge of power, moisture
What can cause this to fail?
Measures and monitors the current flow across a circuit. If the current increases
too high, it will trip a switch, severing the flow of electricity past it.
What can cause this to fail?
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too high, it will trip a switch, severing the flow of electricity past it.
What can cause this to fail?
- Age of Part
- Power Surge
- Lightning Strikes
- Motor Over current draw
Gas ignited by ignition system. This hot, combusted gas rises past a heat
exchanger and out through a vent that leads to the outside of the house.
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exchanger and out through a vent that leads to the outside of the house.
- Metal Fatigue
- Rust / Corrosion
- Debris/Dirt/Alignment of Burners
- Improper fuel air mixture (Incomplete Combustion)
What can cause this to fail?
Can cause system to malfunction including a risk of fire.
What can cause this to fail?
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What can cause this to fail?
- Flame roll out – burned wiring
- Short – seared connections
- Power Surge Damaged Wiring
Capacitors store electricity. A fully charged capacitor allows current to flow at its maximum level as it releases its charge.
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- Age of Part
- Insulator Deteriorated
- Power Surge Damaged Control
- Leakage
What can cause this to fail?
Circuit boards organize and control the sequence of operations in the furnace.
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- Electrical Short Occurred
- Age of Control
- Power Surge Damaged Control
- Lightning
What can cause this to fail?
Compresses low pressure refrigerant gas into a high pressure, high temperature gas.
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- Age has worn valves
- Blocked air flow
- Refrigerant has “slugged” from improper charge
- Power Surge Damage
- Low Refrigerant Caused Damage
What can cause this to fail?
Tubes to carry the refrigerant through so it can be cooled. Must be keep free of damage and clean for them to work well.
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- Age of Part
- Metal has Fatigued
- Formicary Corrosion
- Joint where Solder has Deteriorated
- Animal Damage – Acid
What can cause this to leak?
Powers the condenser fan to blow air across the coil.
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- Age of Part
- Leaking has Occurred
- Insulator Deteriorated
- Power Surge Damaged Control
What can cause this to fail?
Blows outdoor air across the hot condenser coil, cooling the hot Freon gas.
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- Age of Part
- Bent Blade
- Damaged Rain Shield
- Vibration has Damaged Blade
What can cause this to fail?
Sends the correct voltage to power the compressor.
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- Age of Part
- Short Cycling
- Insects
- Insulator Deteriorated
- Power Surge Damaged Control
What can cause this to fail?
A damper controls the draft in an HVAC system. Dampers open and close based on the portion of the HVAC system in use, and they control air flow and venting of the system.
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- Age of Part – motor failure
- Rust has occurred
- Spring damaged
What can cause this to fail?
Controls the defrost cycles on the heat pump.
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- Age of Part
- Moisture in System
- Power Surge Damaged Control
What can cause this to fail?
Control the process of the ignition system. Continuously monitor the furnace’s
operation and the operation of the integrated control module itself.
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operation and the operation of the integrated control module itself.
- Control has failed – electrical failure
- Solid State Circuit Failed
- Electrical Power Surge Damaged Control
- Lightning
What can cause this to fail?
Absorbs the air’s heat and sends it back into the house as cold air via a series
of air ducts. Constricted air flow to coil prevents proper cooling.
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of air ducts. Constricted air flow to coil prevents proper cooling.
- Dirt/debris
- Residue has built up on coil surface
- Oily/Smoke Residue
What can cause this air restriction?
Valve that controls flow of refrigerant into the compressor.
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- Age of Part
- Sensing Bulb Failure
- Contaminants causing a restriction
- Metal has Fatigued
- Excess Vibration
What can cause this to fail?
This is a Safety switch. Shuts furnace down in the event of a overheat situation.
Determines when the blower fan comes on and how long it should stay on.
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Determines when the blower fan comes on and how long it should stay on.
- Age of Part
- Excess Heat – Poor alignment
- Restricted venting or airflow
What can cause this to fail?
Older furnaces have blowers than are driven
by belts instead of directly by a motor.
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by belts instead of directly by a motor.
- Age of Part
- Belt has worn due to tension adjustment off
- Worn Pulley
- Mis-alignment of pulley or wheel
What can cause this to fail?
Responsible for supplying the furnace’s burners with flammable gas once they’ve heated up enough to allow for combustion, and it also shuts off the supply of gas when the burners go out to avoid a fire hazard.
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- Age of Part – corroded contacts on valve
- Malfunction in regulator in valve
- Worn diaphragm in valve
- Improper gas pressure
What can cause this to fail?
Heat Exchanger (Carbon Monoxide Danger)
Designed for the transfer of heat from your return air to your supply air. When your heat exchanger has holes, cracks, or rusted out sections, the air passing over it can actually spread those dangerous CO gases into your home!
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- Age of Part
- Metal Fatigue
- Rust
- Improper combustion
- Over sized furnace
What can cause this to fail?
The wire possess enough electrical resistance so that when a current passes through it, it generates a large amount of heat. This sudden spark of heat is used to light the main burner.
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- Age of Part
- Water leak has Occurred
- Insulator Deteriorated
- Power Surge Damaged Control
- Dirt and Debris
What can cause this to fail?
Absorbs the air’s heat and sends it back into the house as cold air via a series of air ducts.
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- Age
- Metal fatigue – Leaking has Occurred
- Formicary Corrosion
- Solder Joint has Deteriorated
What can cause this to fail?
The draft inducer blower’s purpose is to move air and gases out of the furnace and up through the chimney.
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- Age of Part
- Water Leak has Occurred
- Insulator Deteriorated
- Motor Shorted
- Bad Bearings
- Power Surge Damaged Control
What can cause this to fail?
Captures contaminants in the refrigerant, preventing them from reaching the condensing unit’s compressor.
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- Age of Part
- Plugged due to system contaminants
- Moisture in System
- Restriction in Copper Line
What can cause this to fail?
When activated by an electric current, the surface of the glow coil heats up and ignites the burners in the furnace.
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- Age of Part
- Insulator Deteriorated
- Power Surge Damaged Control
What can cause this to fail?
Refrigerant is what removes heat from air and cools/heats. It has to be properly charged.
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- Over charged too much in system
- Under-charged – not enough (Leaks)
- Leaks in System
Why is this needed?
A simple electromechanical switch which uses a small current to turn a much larger current on and off.
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- Age of Part
- Winding Failure
- Contact Failure
- Power Surge Damaged Control
What can cause this to fail?
When something fails or pressures reach an unacceptable high level or point, the switch will shut off the electrical power in the circuit shutting the furnace down.
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- Age of Part
- Poor Connections
- Corrosion
- Debris in line
- Out of Calibration
What can cause this to fail?
Helps start the compressor.
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- Low voltage to outdoor unit
- Age of existing start kit – wear & tear
- Winding Failure
- Power Surge has Damaged Control
What can cause this to fail?
Prevents compressor damage from a sudden surge of liquid refrigerant and oil that could enter the compressor from the suction line.
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- Age of Part
- Leaks refrigerant
- Rust – corrosion inside
- Improper refrigerant levels
What can cause this to fail?
Surge Protectors are designed to reduce and divert potentially damaging short-duration voltage spikes safely out of the system to Ground. This is similar in concept to pressure relief valves that protect water heaters from over-
pressure.
pressure.
Please click here to read our entire FAQ regarding Surge Protectors.
An important safety device. If the gas does not ignite and
continues to flow, it can cause an explosion when it builds up.
A thermocouple turns off the gas if the pilot is off.
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continues to flow, it can cause an explosion when it builds up.
A thermocouple turns off the gas if the pilot is off.
- Age of Part
- Corrosion
- Out of Alignment
- Plugged Orifice
What can cause this to fail?
Controls the heating and air-conditioning systems in your house. A programmable thermostat provides an effective, economical and easy way to save energy
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- Age of Part
- Misuse
- Improper Alignment
- Electrical power surge
What can cause this to fail?
A furnace transformer reduces your house voltage for use inside your furnace.
- Age of Part
- Short in Wiring
- Power Surge Damaged Control
What can cause this to fail?
- Mold & Mildew
- Dirt and Debris Buildup
- Drain Clogged or Cracked
What can cause this to fail?