Running Too Cool ??

[Robert1994]

I just had a new radiator installed on my car. It seems to be running a little cooler as might be expected. The other night I was coming back from the other side of the island and up-country it started getting kinda chilly. I turned on
the heater, but could not get any heat. I was able to detect air slightly
warmer than the outside air but nothing you could really call warm or hot.
I know the heat from the heater only comes out the vents under the dash, not
the dash vents, and the dash switch was turned to the correct position.
I can't imagine having to change the thermostat because a new radiator makes it run so cool. Anybody familiar with this problem ??
Thanks

 

[IEATVETS]

Mine runs too cool now also when the temp. drops. It may sound stupid, but I was told to put a piece of cardboard in front of the radiator but only cover about 1/3 of it. It helps.

 

[Steve-Indy]

You might want to check to see that the cable from your heater control knob has not slipped off of the water control valve on the heater core , as this has happened frequently to many folks...easy to fix by reataching the looped end of the cable to the little lever arm on the water valve.

 

[99 R/T 10]

If you have put in the 180 degree thermo, the heat will be like warm at best. Nice to live in the south, eh?