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Old 10-12-2018, 05:55 AM   #1
Waiex191
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1999 SL2
1998 SC2
Default Poor heat from the floor vents

When I bought my SL2 new back in '99, there was one thing that was better on my old Dodge Omni. The Omni had awesome heat on the floor - you could feel it on your feet. Today I drove my '98 SL2 for the first time in near freezing temps. It was as good on my feet as the Omni. The '99 has plenty of heat, I am thinking there is an air diverter problem. My search attempt found a lot of Vue info, but no S Series. Anybody have experience working on the vent system that would help explain this?

...
Bryan Cotton
'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018

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Old 10-12-2018, 09:11 AM   #2
cgg17
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1999 SL2
Default Re: Poor heat from the floor vents

Does the recirc work? I dont know if that has anything to do with it, but it may. According to my 1995 owners manual it is supposed to have the max heat at the feet too.

...
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Old 10-12-2018, 09:25 AM   #3
onlinebiker
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Default Re: Poor heat from the floor vents

What is your temperature gauge reading?

It should be about 1/3 of the way up, between 1/4 and 1/2.

The gauges are amazingly consistent. I have yet to see one that reads wrong.

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Old 10-12-2018, 09:46 AM   #4
Waiex191
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Default Re: Poor heat from the floor vents

Recirc works. Temperature is above 1/4 both with the new thermostat after rebuild and the old one as it came from the factory. There is plenty of heat, just not on the feet.

I drove the '98 in today without recirc, but with toasty feet.

...
Bryan Cotton
'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018

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Old 10-12-2018, 11:45 AM   #5
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Default Re: Poor heat from the floor vents

Waiex191, can you verify cooling system temps with a reader, hand held infrared temperature probe or thermometer inserted into the coolant container? Once system temps are confirmed above 190F, you might have to examine the hvac controls and hvac box. For whatever reason, I'm unable to upload drawings. Perhaps later.

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Old 10-12-2018, 12:42 PM   #6
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Default Re: Poor heat from the floor vents

Here are some drawings.
Attached Images
File Type: jpg 20181012_123457.jpg (106.5 KB, 8 views)
File Type: jpg TifToGif (1).jpg (92.8 KB, 7 views)
File Type: jpg TifToGif (2).jpg (100.2 KB, 3 views)
File Type: jpg TifToGif.jpg (92.8 KB, 5 views)

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Old 10-12-2018, 01:23 PM   #7
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1998 SC2
Default Re: Poor heat from the floor vents

Look up high on the left side of the HVAC box and watch the linkage as you move the slider from far left to right. Watch the damper arm on the damper closest to the rear of the car. Check that the carpet has not managed top block the flor outlets which it can do easily.

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