Car heater putting out warm air on 1990 Ford Probe

I turned on my heater a week ago and it is not putting out the heat that it did before -- I see that my temperature gauge is not coming up to normal temperature range even if I drive it for an extended period

by in Taylor, MI on December 03, 2010
1 answer
ANSWER by on December 03, 2010
Sounds like the thermostat is stuck open. This is the first thing I would replace.