There are multiple reasons for that. First of all the thermostat must installed in the proper way. There is a valve which must at it's maximum vertical position. Also if you have bought an aftermarket part you might made a mistake. It's because aftermarket parts a little higher opening temperature. You have two choices: first one is to buy the thermostat from Toyota; second is to but so called "low temperature thermostat" which opens before required temperature is reached. If you live in a cold state you need to buy OEM part because low temperature thermostat effectively decreases temperature of the heating system.
only 2 things can cause this. The most likely is that it is overheating... a lot the least likely is that the indicator is faulty or the wrong type.
The engine is overheating.
if the indicator light is not getting switched off or on
Engine overheating is a good indicator. Some people get them flushed regularly as part of regular maintenance.
To indicate to you that it may need charging, replacing, or a loose connection.
Its overheating.... or the wire shorted
Overheat IndicationYou've answered your own question. If the "overheat indicator" is indicating overheating, then the engine and the coolant is OVERHEATED!!!!!!Overheating is a serious situation and any indication of such requires that a qualified automotive technician check the vehicle and determine the cause for the overheating, and correct it to prevent permanent, and possibly very expensive, damage to the engine.Or, another remote possibility is that the engine/coolant temperature sensing/indicating system has become defective.
because it is a quick and easy way to find out how developed a country is.
The dashboard indicator light might have a loose connection. The dashboard indicator light might have a corroded or loose ground wire.
Your hot dog truck may be shutting down because it is overheating. This is usually an indicator that there is a problem with your radiator.
The yellow fuel dispenser warning light indicates low fuel. The red battery indicator light indicates the charging system is malfunctioning. The red high water level indicator light indicates the cooling system is overheating.
Although an indicator of low batteries does not usually alert in a random sequence, if you are sure the sound is coming from the thermostat, the first thing to do is check if the batteries need to be changed.