Heat coming out of vents minimal. alrdy replaced thermostat

If you replaced the heating element, and the vent is absolutely clear it should not overheat and turn off. Is your timer motor shutting down the power prematurely? Sure the thermostat is functioning properly?

One of two things. Most likely is that your heater core is somewhat plugged up or your thermostat is stuck open.

try it put n a earthing pint n the car heat the car up and wait for it to spin shouldint take long

IF YOU CAN'T FEEL THE AIR FLOW OUT BUT YOU HEAR THE BLOWER MOTOR WORKING, BEHIND THE GLOVE BOX IS A CABIN FILTER.REPLACE FILTER
IF YOU HAVE GOOD AIR FLOW BUT NO HEAT:
1;VACUUM LEAKING TO HEATER CONTROL
2;WATER PUMP GOING BAD / NOT CIRCULATING COOLANT,HIGH RPM/MORE COOLANT TO THE HEATER CORE
3;OPEN THERMOSTAT/ENGINE TEMPERATURE TO LOW
1;CHANGE THE DIRECTION FROM VENTS TO FLOUR TO WINDSHIELD. IF NOTHING HAPPEN IS THE VACUUM
2;RUN THE ENGINE INSIDE ON WARM PLACE ON IDLE.NOTE THE GAUGE IF PAS 1/2 TO 3/4. IF PAS 3/4 MARK REPLACE WATER PUMP
3;IF GAUGE STAY BELOW 1/2 REPLACE THERMOSTAT
GOOD LUCK

Airbound more than likely..if not then check flap motors on heater box.

I’m happy to assist further over the phone at https://www.6ya.com/expert/howard_977676954994c5b2

ifs theres air coming out of the vents could be a thermostat if theres no air could be blowermotor

If the temperature is cold outdoors, this can be a symptom of a stuck open thermostat. With the thermostat stuck open the engine never gets warm, so it won't give good heat. It's not expensive to get a new one, and they are easy to replace, so take it in and have it checked. Another symptom of that is very low gas mileage in the cold weather.

If you don't hear a thud or noise of a flap opening or closing when switching between hot and cold then a lever is probably broken.

is your fan clutch kicking in? It could be bad. crab the fan blade and try to move it back and forth. If it moves more than minimal you will need to replace your fan clutch.

probably the vent in front of the blower motor lose, check that first.