check your owners manual and check what kind of heater you have electrical or "conventional"(works with antifreze) because since they are difrrent units they have diffrent causes for a no heat condition. if you have a conventional heater core try having the cooling system flush.(professionaly) or buy the "preston flush and fill kit" if that don't work then you may need to change that core, which in many vehicles the entire dash board needs to be taken out in order to reach the core.
have you changed the battery in the thermostat?
You may have the thermostat in backwards. The spring side of the thermostat faces into the engine.
You could have a bad water pump causing no coolant flow, inoperable radiator fans, a coolant leak,............
No
physical energy
it is a hyndai that's why it is a hyndai that's why
Assuming repairs have been performed properly and there are no DTC's; you have an electrical problem.
The thermostat is not opening up enough,
You have to install the thermostat with the jiggle valve in the 12 o'clock position.
The thermostat is inside of the water inlet on top of the motor. Disconnect the top water hose, then unbolt the water inlet. The thermostat can then be changed.
Bad Gauge---Electrical short---Bad fuse---Bad sending unit---loose or bad electrical connector to the gauge. Bad sensor. Had a faulty gauge on my 97 Ford Ranger. I changed the thermostat and the sending unit and the temperature sensor it started wotking beautifully.
The thermostat on a 2004 Chevy Venture is changed by draining the radiator, removing the upper radiator hose, and unbolting the thermostat housing. The old thermostat and gasket can then be removed and replaced.