In dash a/c turns hot

[LynnandDot]

06 Itasca Sunova with Ford V10 in dash a/c starts out cold, and as the engine gets hot the a/c turns hot. I suspect that heat from the heater is being blended into the cold. Anybody heard of this?

[ThePowells]

Usually it is a blend door issue. There may be a "relearn" process for them as with the GM products.

[PSOUZA]

Originally Posted by LynnandDot

06 Itasca Sunova with Ford V10 in dash a/c starts out cold, and as the engine gets hot the a/c turns hot. I suspect that heat from the heater is being blended into the cold. Anybody heard of this?

Your RV should have an Evans Tempcon A/C system.


This link to the service manual may help.

http://www.evanstempcon.com/pdf/ElectricalSystems/Dash_All_Electric_HVAC_System_Service_Manual.pdfn




And yes it happens but is not the most common cause. Low refrigerant level is the most common cause on older systems. (more than 5 years.)


There is a specific test illustrated in the manual that you can run to help verify your suspicion.


Phil

[shootist]

heater valve , blend door , no ac can overcome a heater.