AC temp...??
Hotshot
Joined: Feb 2003
Posts: 11,537
Likes: 27
From: Long Beach, Ms.
The "evaporator" is inside the heater box as is the heater core (hence the name "heater box) and is about as difficult an item to get to as there could be on your truck. They share the main housing and there is a door that swings to select whether you get air through the heater or the AC side. The hot engine coolant normally flows through the heater core whenever the engine is running. A lot of people will put a valve in the heater hose to prevent hot fluid from circulating through the box during the summer months. I have some pics of my valve install on my van;
This is a manual valve with a bypass hose.
This is a manual valve with a bypass hose.
Logistics Pro
Joined: Mar 2002
Posts: 3,881
Likes: 84
From: Wake Forest, NC
You can blow some compressed air through the cooler to make sure that there aren't any clogs for airflow (be careful not to damage any fins).
There's little to no airflow across the condenser during city driving (unless your engine fan is running, and even then it's no comparison to freeway driving), so your A/C efficiency is much lower at slower speeds. Granted, even though it's not as effienct, the Super Duty's A/C performance leaves a lot to be desired. You'd think that a heavy duty truck with a heavy duty cooling system for the engine (8+ freakin' gallons!) would have a heavy duty cooling system for the cab!
I try to avoid recirc since that recycles the cabin air. I prefer fresh air when I can. Unfortunately my A/C is so bad that if it's more than 75F outside, I get almost no cooling unless I'm on the freeway or in recirc. I'm on the fence about trying a charge or if I should evacuate the whole system for a complete refill.
There's little to no airflow across the condenser during city driving (unless your engine fan is running, and even then it's no comparison to freeway driving), so your A/C efficiency is much lower at slower speeds. Granted, even though it's not as effienct, the Super Duty's A/C performance leaves a lot to be desired. You'd think that a heavy duty truck with a heavy duty cooling system for the engine (8+ freakin' gallons!) would have a heavy duty cooling system for the cab!
I try to avoid recirc since that recycles the cabin air. I prefer fresh air when I can. Unfortunately my A/C is so bad that if it's more than 75F outside, I get almost no cooling unless I'm on the freeway or in recirc. I'm on the fence about trying a charge or if I should evacuate the whole system for a complete refill.
