A couple of things comes to mind.....1, your Thermostat is not functional, as in it's stuck open etc. 2, the simple answer is the amount of fluid (water/anti-freeze) is low; make sure you have the fluids top-off. 3, you didn't say but if the air is or isn't blowing cold before it does get hot, maybe the vacuum line to the door to let the hot air come from your heater core is having a problem-or-the door itself is having a problem. Hope this helps, P. Ford
Answers & Comments
A couple of things comes to mind.....1, your Thermostat is not functional, as in it's stuck open etc. 2, the simple answer is the amount of fluid (water/anti-freeze) is low; make sure you have the fluids top-off. 3, you didn't say but if the air is or isn't blowing cold before it does get hot, maybe the vacuum line to the door to let the hot air come from your heater core is having a problem-or-the door itself is having a problem. Hope this helps,
P. Ford