number 1. Expansion valve. there is one, I cannot see the other.If there are two evaporators, there will be two expansion valves. The suction tube (large)
should be cold coming out of each evaporator.
Just looked at Rock Auto parts. They list both a front and rear expansion valve with different part #'sThanks for the information. In the topic above there is a link where the service is and there is one expansion valve in the diagram. I don't see the other.
As both the front and rear evaporators operate off the same refrigerant system, it is important to identify the area of the leak to reduce your disassembly time. If rear was cooling well are you sure there is a leak?Air conditioning service indicates that the evaporator or its connections are leaking. I will disassemble the dashboard myself. Does anyone have videos of such work? any hints?
My profession is automotive air conditioning. If sensor is picking up R134A in front vents,A few days ago, the back stopped cooling. 50gr r134a left. The sensor shows r134a in the front air vents. Diagnosis of leaky evaporator. I don't know if the O-rings are leaking or the evaporator is leaky. I have to take the cockpit down. A lot of work. I am also thinking to give a sealant for the air conditioning system? What do you think?
This is not going to be a fun job, I found a you tube video but it is poor. I have not done a CX9 myself but have done a Ford Edge which is similar. The link to the service manual in this thread should help. Good luck! Mazda cx9 changed evaporator and expansion valveToday I wanted to pull out the evaporator. Failed to. A lot of work. I removed the cockpit and got to the heater. To remove the heaters, unscrew the metal beam. There is a screw on one side and 3 square screws from the bar They are welded together. I don't know how to unscrew them.Is the evaporator behind the heater? Can it be unscrewed from the bottom of the heater?