Air Coming thru Defrost Vents

chrismc101 · 02-04-2006, 12:02 PM

I notice under the hood that someone disconnected the two hoeses that run to the heater coil for the car to run heat. What they did was take piece of tubing and ran the two hoses together. I pulled them apart and I noticed (antifreeze) maybe (I don't know) coming out of the hoses.

WHY would someone have these two hoses ran together in this nature? What purpose does it serve for them to be connected? I know I wanna have my heat running. If I unhook them from each other, which hose goes to which connection?

Somebody help me out, it's about to get cold in NC, even though FOXIE is put away for the winter & beginning restoration/modificaions for summer.

DZEE'S LX · 02-04-2006, 12:22 PM

Someone has simply bypassed the heater core. I can think of two reasons why this might have been done:

1. Heater core is leaking. You don't mention the year of your car but most fox body Mustangs are a PITA for replacing the core. You have to pull the console, instrument panel, and dash to get to the case that houses the core. This can be a significant and frustrating job, but it is definately doable if you have the patience for it.

2. Mixer door is not working right and someone wanted the air conditioner to run colder by having no warm air mixing when the A/C is on.

3. Someone told the previous owner that bypassing the heater core would produce an extra 50 h.p.

I'd guess reason #1 is the culprit but you can simply hook the hoses back up and see if anything leaks inside on the passenger side or under the car after running the engine at temp for awhile (possibly days). If your windows fog up easily that is also a sign of a bad heater core. You can also smell the antifreeze because the fan will fill the cabin with that lovely scent.

Can't remember which hose goes to which side.

Good luck!

02-04-2006, 12:22 PM	#2
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	Re: Air Coming thru Defrost Vents Someone has simply bypassed the heater core. I can think of two reasons why this might have been done: 1. Heater core is leaking. You don't mention the year of your car but most fox body Mustangs are a PITA for replacing the core. You have to pull the console, instrument panel, and dash to get to the case that houses the core. This can be a significant and frustrating job, but it is definately doable if you have the patience for it. 2. Mixer door is not working right and someone wanted the air conditioner to run colder by having no warm air mixing when the A/C is on. 3. Someone told the previous owner that bypassing the heater core would produce an extra 50 h.p. I'd guess reason #1 is the culprit but you can simply hook the hoses back up and see if anything leaks inside on the passenger side or under the car after running the engine at temp for awhile (possibly days). If your windows fog up easily that is also a sign of a bad heater core. You can also smell the antifreeze because the fan will fill the cabin with that lovely scent. Can't remember which hose goes to which side. Good luck! __________________ Spec Service (UHP), BFG G-Force KDW's, Turbo Coupe 3.55 rear w/disks, 73mm calipers, Stg 1 Twisted Wedges, TFS Street Intake, 70mm TB, E cam, Crane 1.7's, Aeromotive FPR, BBK 1 5/8 shorties, elec fan, FMS Al Radiator, Moroso Wires, Kenne Bell Ramair, March pulleys, Race Magnums, 190 lph Walbro, FMS Al Dshaft, D/S loop, MM 4point rollbar, FMS C spngs, strut tower brace, Tokico Illuminas, Prothane bushings, MM Lwr Conrol Arms, KB welded subs, Cervini Mach 1 hood/valence/side skirts/wing/airdam.

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02-04-2006, 12:02 PM	#1
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Re: Air Coming thru Defrost Vents I notice under the hood that someone disconnected the two hoeses that run to the heater coil for the car to run heat. What they did was take piece of tubing and ran the two hoses together. I pulled them apart and I noticed (antifreeze) maybe (I don't know) coming out of the hoses. WHY would someone have these two hoses ran together in this nature? What purpose does it serve for them to be connected? I know I wanna have my heat running. If I unhook them from each other, which hose goes to which connection? Somebody help me out, it's about to get cold in NC, even though FOXIE is put away for the winter & beginning restoration/modificaions for summer.