Did a quick search and came up empty. Put hvac on defog no problems. But legs get cold. Put on heat and legs are warm but windows fog up. Any little trick to an in between?
------------------ ( Create a team, analyze, make a plan, then ask the wife if it's OK.)
First, clean the heck out of your windows. Then, use that no-fog stuff on the inner glass. And don't leave any open containers of liquid in your car when yer not in it. Could also use a small can of damp-rid under the seat. Looks like a tuna can. Sucks up the excess moisture.
I was wondering if anybody did a mod with the ac. Maybe disconnect the fan for ac and put on bi level or something. Just a thought. I just keep hitting heat and then defrost every 10 min. or so. Where can a fella pic up the no fog stuff? Stacey
------------------ ( Create a team, analyze, make a plan, then ask the wife if it's OK.)
Is your heater core leaking? A leaky heater core will cause your window to fog up as soon as you turn on your heat. The higher your blower is running, the worse it'll get. Usually you can smell the antifreeze, it's sort of a sweet smell, and if the leak is bad it'll drip on your passengers side carpet. I suppose it's possible for it to cause a little fog even if the heat is off.
You may want to check your ducting, mainly around the heater core. Little critters could have been in there and stored their stash in there. If your heater core and air flow are up to snuff you should be able to keep the windshield clear and your feet warm at the same time.
Same problem with my Fiero also. Not like the newer vehicles. Don't have that problem in the Silverado or TrailBlazer. I think the previous posts have the moisture problem acknowledged. Unfortunately, I think it's the moisture from me breathing. Other than switching between heat and defroster, I usually open the sunroof or crack the window a bit. However, being 1° this morning and 10" of snow, that wasn't an option. So I took the truck to work.
You may want to check your ducting, mainly around the heater core. Little critters could have been in there and stored their stash in there. If your heater core and air flow are up to snuff you should be able to keep the windshield clear and your feet warm at the same time.
Also if someone used certain stop leak products in the antifreeze/coolant some of them can accumulate in the heater core blocking flow, they can be back flushed out if you disconnect both the heater hoses and use water pressure (garden hose) to flow backwards from the normal flow of the antifreeze. Then refill with proper mix of antifreeze/distilled water. Its a good time to do this when you drain and fill antifreeze as normal maintinence. I had to do this twice on a truck I bought and tons of stuff came out and the heat is much hotter now. Also if your thermostat isnt working properly you might have poor heat.
[This message has been edited by 2.5 (edited 01-22-2014).]
That's a real possibility in a Fiero because there is Soooo much coolant for the size of the cabin. In this cold weather the coolant may never get up to temperature.
I guess I should have been more clear. Temp is great, blows killer heat. It was 0 out last night and going 75 on the interstate couldn't keep the sides of front windshield and most of the side glass from frosting up. Had to keep going from heat to defrost. That heater is nice but I prefer a wood stove. Stacey
I guess I should have been more clear. Temp is great, blows killer heat. It was 0 out last night and going 75 on the interstate couldn't keep the sides of front windshield and most of the side glass from frosting up. Had to keep going from heat to defrost. That heater is nice but I prefer a wood stove. Stacey
Kinda gotta live with it, thats what we get for Pontiac not designing them with a defrost/floor setting, where it blows out both at the same time. That setting is great for us northerners. You could get that 12v heater fan for teh dash top though.
Wanna get real creative jerry rig this to direct heat from some of your dash vents to the windsheild and leave it set to Bi level (floor/dash).
Temp is great, blows killer heat. It was 0 out last night and going 75 on the interstate couldn't keep the sides of front windshield and most of the side glass from frosting up.
I've got to agree with what has previously been mentioned. I think your problem is excessive moisture in the car. The windows aren't going to frost up on the inside unless there's a ton of water hidden inside the cabin somewhere (probably soaked into the carpet padding).
I just got back with a buddy from lunch. His brand new GMC couldn't keep the sides from fogging on def./heat. Yes Both Fieros are in heated garage with probably soaking wet carpet from all the snow.
------------------ ( Create a team, analyze, make a plan, then ask the wife if it's OK.)
A little thing you can do is keep windows down when in the garage it will help some of the wetness evaporate while parked. Use rubber mats with ridges to keep the water off the carpet.
[This message has been edited by 2.5 (edited 01-22-2014).]
I keep the windows down. Thing is I'm doing a lot of filly fartin and keep getting a bit of snow on the carpet. Nice ribbed mats are in the trucks. These clasics shouldn't be in the elements anyway. I'm new here and really want to get some pic up of the cars but I need some good shots and there is too much snow. Stacey
I keep the windows down. Thing is I'm doing a lot of filly fartin and keep getting a bit of snow on the carpet. Nice ribbed mats are in the trucks. These clasics shouldn't be in the elements anyway. I'm new here and really want to get some pic up of the cars but I need some good shots and there is too much snow. Stacey
Dobey has the right idea. Instead of full defrost use bi-level with the blower on high. Rain-X now makes a product for the inside of the windows. You must clean them well before applying. Anytime you get into the car after being in the rain or snow you carry moisture in. It will evaporate and then condense on the windows. Providing it isn't raining, you can lower one of the windows ever so slightly to allow better air flow and moisture to escape.
I would also suspect you may have a leak. An area that's hard to detect is around the screws that hold the front cowl cover in place. If it's ever been removed, the screws must be sealed well when reinstalling. They also rust and lose their seal. Water will enter the passenger compartment and get into the carpet and padding way up under the dash. One of those screws is behind the center radio console and hardest to diagnose. Replace them with stainless screws and seal them with butyl rubber.
Id guess your carpet is damp first. I keep what cars I can in the garage overnite. I had 3 Fieros, all with rear defrosters disconnected, and never had any windows fog up very much. Once in a great while in the spring and starting to warm up, they would a little if it was pouring rain and the windows were closed. If your car has AC, the dehumidifier is supposed to run with the heater too to keep it from fogging. Sometimes you can just crack the side windows open like a 1/4". Old cars with vent windows never had the problem new ones do. I wish someone would bring them back.
Our 2004 Tahoe (and our old 99 SIlverado) both do (did) this real bad. My 2005 F-250 doesn't do it at all. The heat in the Tahoe sucks, and it has rear heat also. Can't ever get it warm enough because too much cold leaks in. My Silverado would actually frost up on the INSIDE of the passenger window. I later discovered the heater box was installed wrong and it allowed cold outside air to come in under the dash. Great job GM.
Why isn't there a setting that allows me to have heat on my feet, out of the vents and defrost ducts all at once?
------------------ 1986 SE Aero coupe.
3.4 DOHC swap is complete and running, now just have to finish the rest of the car...
A modern dash might be a problem solver. a 12v travel hair dryer mounted in dash for a cheap fix.
It's not the dash, the Fiero HVAC itself does not support the mode with defrost and floor heat. Nearly all modern cars do, but I would go one further. I want to be able to get all three at once, which you can't seem to get.
One of my projects is to make an all electronic HVAC controller for the Fiero. Riceburner98 already has done this and is selling them primarily for the re-body market, but it would be nice to have modern control over the Fiero HVAC in a stock application. The problem with me building one is that I would have to teach myself programmable micro-controllers, so it's not going to happen any time soon.
No such button on the Fiero. The second button from the right is pure heat.
Second button from the right---My 86, 87 and 88 Owners Manuals under the Instrument Panel section says:
" Heater---Outside air is directed through the heater outlet and side window defoggers, with a small amount to the windshield. Another economy position. "
the cars without AC allow you to set a 'blend' between defrost and heat settings. Real northern cars don't have AC, it is replaced with a rear window defroster. (ok, I've never actually used it, but I know it's there).
the cars without AC allow you to set a 'blend' between defrost and heat settings. Real northern cars don't have AC, it is replaced with a rear window defroster. (ok, I've never actually used it, but I know it's there).
dave
Both A/C and rear window defrost could be purchased on a Fiero. Many Fieros have both.
