it maybe your heater core is going out recommend replacing it and go from there
Souns like a head gasket to me.
Replace Thermostat
Check coolant level in RADIATOR when cold When light is blinking turn on heat and see if you have any. If no heat good indication that thermostat is stuck in closed position and needs to be replaced
Bad Thermostat
The principle of a thermostat is to regulate heat or cold air. Thermostats can be used for rooms, people, or cooking.
it goes out and your heat will be gon
When a thermostat goes bad in a vehicle, it can make your car overheat. It can also make it t where you do not have any heat inside your car.
If it's stuck open, no heat. If it's stuck closed, over heat.
Yes, and it can also make your car to over heat
My first guess would be a thermostat stuck open. Replace the thermostat.
Sounds like it could be a bad thermostat - not closing to allow engine to heat to normal operating temperature
Probably a bad thermostat.