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97 ford f150 4.6l  temp gage in normal range but no heat.gage goes to hot for abot 5seconds drops back to normal and then i have heat.coolant level full and and no bubbles in overflow and no white smoke from exhaust….any ideas

I have a 2004 Infiniti G35X. When the car is idleing it won’t blow heat. (it blows cold air) While you are driving it blows good heat. I had one mechanic tell me that the water pump propellers are worn down so at idle it doesn’t pump enough water. Could this be the problem?

I have been starting my truck up in the morning since it is 5 degrees. I let the truck run for about 30 min and when I get in I still have ice on windshield and the truck is blowing cold air. It does not seem to blow hot air until I start driving it. This is crazy! I have to actually scrape windshields before I can drive it to produce heat. Any recommendations?

I have changed the thermostat – no issue there – still not heat -

The heat in my 95 camaro 3.4 liter V6 is not working. I have changed the thermostat and flushed the system and have no symptoms of a bad or leaky heater core, what else could it be?