What happens when TXV is stuck open?
A small amount of refrigerant vaporizing will cause a lower pressure. High Superheats — High superheats also are caused by the evaporator and compressor being starved of refrigerant. With the TXV restricted, the evaporator will become inactive and run high superheat. This will cause the compressor superheat to be high.
Can a TXV fail open?
A TXV may fail either too far open or too far closed. Too far open is also called “overfeeding” and it means that boiling refrigerant is being fed too far through the evaporator coil, and this would show up in low superheat.
Can low refrigerant cause TXV to freeze?
Thermostatic expansion valves (TXV) are responsible for metering the proper amount of refrigerant into an evaporator coil. If this malfunctions then not enough refrigerant will pass through the system and the coils. That will cause a freeze up.
What to do if your Mazda 6 has soot in it?
Remedy: Vehicles affected will have the engine / oil checked for contamination and replaced if necessary. The Fuel injectors will also be re-tightened to the appropriate torque. Problem description: Soot may accumulate around the intake shutter valve on the inlet side of the engine.
What causes a Mazda 6 SkyActiv to stall?
This could cause combustion gas to leak from the injector and contaminate the engine oil within the cylinder head. This, in turn, could cause the engine oil strainer to become blocked. This could cause the engine to stall. Engine Pressure Oil Light appears along with the engine malfunction indicator – Possible Engine Stall without Warning.
What causes a Mazda 6 SkyActiv to leak oil?
RECALL: The tightening force of the injector mounting nuts may be insufficient. This could cause combustion gas to leak from the injector and contaminate the engine oil within the cylinder head. This, in turn, could cause the engine oil strainer to become blocked.
What to do if your expansion valve is failing?
If you suspect that your expansion valve or orifice tube may be having an issue, have the vehicle’s air conditioning inspected by a professional technician, such as one from YourMechanic, to determine if the car will need an AC expansion valve replacement or another repair.
Remedy: Vehicles affected will have the engine / oil checked for contamination and replaced if necessary. The Fuel injectors will also be re-tightened to the appropriate torque. Problem description: Soot may accumulate around the intake shutter valve on the inlet side of the engine.
Is there a problem with my Mazda 6 SkyActiv?
Problem description: Soot may accumulate around the intake shutter valve on the inlet side of the engine. Remedy: Check, clean or replace the intake shutter valve and update software. As you can see, they are not potencitially dangerous but it is better to correct them to no affect the well performance of the car.
If you suspect that your expansion valve or orifice tube may be having an issue, have the vehicle’s air conditioning inspected by a professional technician, such as one from YourMechanic, to determine if the car will need an AC expansion valve replacement or another repair.
RECALL: The tightening force of the injector mounting nuts may be insufficient. This could cause combustion gas to leak from the injector and contaminate the engine oil within the cylinder head. This, in turn, could cause the engine oil strainer to become blocked.