Help.. Heater not working very well
Thread Starter
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
Help.. Heater not working very well
My heater is blowing warm air at best.. Normally it puts out some serious heat.. Checked thermostat and its ok.. Car Warms up to normal operating temp.. No antifreeze leaks.. Plenty of fluid.. Could it be the thermostat or a relay? I have the basic stock climate control system that all 1999 C5's came with, not the fancy dual zone system.. Thanks f
Race Director
Joined: Oct 2004
Posts: 18,401
Likes: 3
From: Retired but working
Cruise-In VI Veteran
Could be too much coolant. Daughter changed her coolant and filled it up with Dex and it put out warm air and that was about it. I checked it and it was good to 500 below zero.
I told her to by the 50/50 mix, but she bought straight coolant
I asked her how much water she put in and she said none.
I drained the radiator. Filled it with distilled water and it started putting out heat immediately.
Check the density of your coolant.
I told her to by the 50/50 mix, but she bought straight coolant
I asked her how much water she put in and she said none.
I drained the radiator. Filled it with distilled water and it started putting out heat immediately.
Check the density of your coolant.
