98 Trans Sport Heater Not Blowing FIX Re-Visited.

[woscarr]

Since it's such a nice day here in Ottawa (plus 5 c & sunny), I decided to go have another look at the problem (shows you how much I drive this van... it's been sitting for two weeks now).

First thing I notice after startup and trying the fan. Putting my hand to the vents, still very low air flow with fan set to '5' max.

Well as soon as I started to switch between hot and cold the problem seemed to clear it's self. Now a hurricane coming thru the vents on the dash (not mention a/c working good too)... switch back to heat still blowing very strong.

So it would seem something was sticking somewhere... in the vacuum controlled blend/ direction gates. And the cold weather seemed to bring out the worst in a sticky situation

Vacuum is strong, with van at idle approx. 600-700 rpm (very smooth idle I might mention) and switching the heater controls, you can hear the actuators respond immediately and redirect airflow.

I'm putting my money on something sticking somewhere... simple right ! Only problem is that Something is deep inside the dash Somewhere !? Well maybe something for a dog-day-of-summer project.

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More to come.
Wayne