The average cost for an orifice tube replacement is between $61 and $80. Labor costs are estimated between $51 and $65 while parts are priced between $10 and $15.
Symptoms of a Bad or Failing Expansion Valve (Orifice Tube)
- AC system performing worse than usual and blowing warm air. One of the first symptoms of a problem with the AC expansion valve or orifice tube is an underperforming AC system.
- Frost on AC evaporator or coming from the vents.
- AC compressor constantly running.
Subsequently, question is, what is an orifice tube? Like an expansion valve, the orifice tube is used to control the amount of refrigerant entering the evaporator. An orifice tube is a simple fixed device with no moving parts. It cannot vary the amount of refrigerant flowing into the evaporator the way an expansion valve can.
Correspondingly, what happens if orifice tube is clogged?
Clogged Orifice Tube. The orifice tube can become restricted and clogged with debris. A clogged orifice tube is typically caused by compressor failure. When this happens, little pieces of metal and aluminum shrapnel will be found in the tube’s screen filter.
Where does an orifice tube go?
Because of the way an orifice tube works, it’s usually located on the inlet to the evaporator coil. However, on some vehicles the orifice tube location varies. Sometimes it is built into the liquid or high pressure line or inserted into the high pressure line right where the line connects to the condenser.
How do you test an expansion valve?
How to Test an AC Expansion Valve Make sure the AC unit is plugged in or, if it is in an automobile, turn the vehicle on. Use the manual to locate the thermostatic expansion valve. Lift the sensing bulb from the suction bulb well. Hold the sensing bulb in your hands for two minutes or place it in warm water.
What color should my orifice tube be?
When deciding which orifice tube you should use, remember that color is important. Orifice tube colors identify orifice diameters. Substitution of different color orifice tubes will not work For example, a white orifice tube cannot be substituted for a yellow or red orifice tube for blue in a Ford.
Where is the fixed orifice located?
A fixed orifice tube contains a small brass tube incased in a plastic case with a filter at each end to protect it from any debris in the system. It’s located between the condenser and the evaporator core.
What causes an expansion valve to fail?
Expansion Valve Problems Over time, this pressure can cause the expansion valve to break down. A failed expansion valve will no longer be capable of limiting the flow of refrigerant. Instead, excessive amounts of refrigerant may flow into the evaporator coil.
How do I know if my condenser is bad?
Usually the vehicle will display a few symptoms when the condenser fan has failed. Lukewarm air. One of the first symptoms that a fan has failed is the air coming from the vent being warm. Car overheating while idling. Burning smell when the AC is on.
How does an orifice tube work?
An orifice tube has no moving parts and contains a permanent restriction within the system. The orifice tube systems control the refrigerant flow through other means, such as cycling the compressor on and off, or the use of a refrigerant regulating valve within the compressor itself.
Can you flush expansion valve?
Question: Can I flush through the Orifice tube or expansion valve? Answer: No. Flushing through the orifice tube or expansion valve is too restrictive to the flow of solvent. There is one exception of course.
What happens if AC condenser is clogged?
When it becomes dirty or clogged, then your unit still runs, but the air does not get cooled. The cooling efficiency of your unit can go down by 30 percent when these coils stop working. Low levels of refrigerant may also cause insufficient cooling of your system.
How do you adjust an expansion valve?
To adjust the static superheat, turn the valve’s setting stem. Turning clockwise increases static superheat and effectively reduces refrigerant flow through the valve. Turning counterclockwise reduces static superheat and increases refrigerant flow.
What will a dirty condenser do?
If a condenser becomes dirty or fouled, less heat transfer can take place from the refrigerant to the surrounding ambient. The greater the temperature difference, the greater the heat transfer. The condenser is now rejecting enough heat at the elevated Delta T to keep the system running with a dirty condenser.
How do you know if your air conditioner is clogged up?
4 Signs Your Air Conditioning Drain Line Is Blocked Standing Water. Standing water is the most obvious sign there is something wrong with your air conditioner. Full Pan. Moldy Smell. Water Damage.