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My Silverado don’t blow hot heat, kinda warm. Changed thermostat and checked antifreeze is good. What do you think is the problem

I have a 1994 Chrysler Lebaron Convertible with a V-6 and A/C. Is there a way to increase the heater output, like changing the thermostat? It has a four speed automatic which keeps the revs low on city streets. I’ve noticed the incoming air is much warmer when the rpms are greater than 1800 but at low speeds the engine rarely gets up there. If I drive in 3rd gear the revs get up over 1800 but the fuel economy suffers. I was wondering if there was a way to increase the temperature of the incoming air.

2002 Nissan Altima only gets heat when car reaches 40 miles per hour.Is it my thermastat, heater core or what?

i have 2004 explorer no heat but strong ac replaced thermostat and topped off antifreeze all that comes out is cold air.

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?