I am having some heat problems with my 98 Civic. When I start the car and let it warm up, the car will get warm but the heater won't heat up all the way. And then when drive the heater will get to it's normal temp. But when I stop again, it will cool back down. Now I have already replaced the thermo last year, but am not sure what to look for next. Any help is appreciated.

 

About how cold is the outside temp when this happens? Like on a really cold day does the temp drop back down more than on a not so freezing day?

 

Its probably the waterpump. My old Cadillac had the same exact problem.

I would imagine that it would be basically the same symptoms for any car.

 

Bleed the system ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slow EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">About how cold is the outside temp when this happens? Like on a really cold day does the temp drop back down more than on a not so freezing day?</TD></TR></TABLE>

No, it does it consistently whatever the temperature is outside.