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Carrier 40MFC018 Expansion Valve
Your main AC unit can not work right when lacking a functioning expansion valve. Almost all AC systems have an expansion valve that lets the coolant to expand back into its natural vapor form from a high pressure liquid state.
Some clues of a worsening expansion valve
- The air conditioner takes a really long time to comfortably cool all the rooms in your house
- AC air production is well below the temp it used to be exiting the vents
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If you are going to be buying or ordering a new Carrier 40MFC018 replacement part do your best and cross-check the model number as well as make a visual inspection so that you are positive that the correct expansion valve is the one being purchased. You do not need to replace the part all by yourself. Hire someone with experience locally to hire and install the part for you.
Feel free to download your manual for help.
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