New guy with heater question (pic)
Thread Starter
Racer
Joined: Jun 2005
Posts: 293
Likes: 1
From: Pace Florida
New guy with heater question (pic)
Hi everyone,
Been reading forum for a while, but haven't posted. Have a heater related question. Had my heater core replaced, and left most of the ducting off as I'm going to insulate the interior. (shut off valves in hose lines, and insulated exhaust also). This leaves a large approx 5" square duct facing into the compartment. While moving, there is hot air coming in thru this duct, presumably from the engine. OK, now the stupid question. Where is the intake for this and can it be shut off?
Been reading forum for a while, but haven't posted. Have a heater related question. Had my heater core replaced, and left most of the ducting off as I'm going to insulate the interior. (shut off valves in hose lines, and insulated exhaust also). This leaves a large approx 5" square duct facing into the compartment. While moving, there is hot air coming in thru this duct, presumably from the engine. OK, now the stupid question. Where is the intake for this and can it be shut off?
Racer
Joined: Mar 2006
Posts: 366
Likes: 1
From: Houston Texas
A couple of possibilities. On my 76 with AC, I solved this problem when I fixed all of the vacuum leaks in the ac/heat/vent/def controls. The temp hot/cool control on the console effects two different things:
1. a cable that physically opens a flapper to mix ac condenser/heater coil air to regulate temperature
2. vacuum controled heater hose switch to allow or block hot water flow thorugh the heater core
Another possibility is air flow through the firewall if the heater core hose plumbing was not sealed.
1. a cable that physically opens a flapper to mix ac condenser/heater coil air to regulate temperature
2. vacuum controled heater hose switch to allow or block hot water flow thorugh the heater core
Another possibility is air flow through the firewall if the heater core hose plumbing was not sealed.
Thread Starter
Racer
Joined: Jun 2005
Posts: 293
Likes: 1
From: Pace Florida
Thank you for the response. I just had the heater core replaced, and I installed a shutoff valve in the hoses to the core. I'll have to see if the plumbing area was sealed properly and if the flapper works.
Appreciate the info!
Appreciate the info!
