Have you checked the water level in the coolant expansion tank, if low this will not heat up the car. If level ok maybe thermostat is stuck Have you checked the water level in the coolant expansion tank, if low this will not heat up the car. If level ok maybe thermostat is stuck
You have run out of coolant, or the heater matrix is blocked.
The shower water may not be hot enough due to issues with the water heater, such as a malfunction or setting adjustment.
The amount of hot water available will depend on the number of fallons available in the hot water heater.
Either the thermostat has been set too low, your hot water heater is not big enough, or your hot water heater has not been installed properly.
There are a few causes here. First of all check you have enough coolant, if it has run out there will be no heat transfer from coolant to heater radiator. This is dangerous to the engine. If it has coolant, then try back flushing the cooling system, especially the heater matrix to remove any foreign object that could be causing a blockage. When refilling, fit the antifreeze first then start the engine. Make sure you have the heater controls facing the windscreen, on hot and fan no faster than position 2. With the engine ticking over, slowly fill the system until it reaches the correct level. Leave the cap off until the thermostat opens. (When hot coolant circulates) Recheck the level and fit the cap.
defective thermostat to engine cooling system (the system which also provides heat i.e. hot water, to the heater matrix)
Electric Hot Water Heater, Gas Hot Water Heater, Tankless Hot Water Heater, Hot Water Heater Leaking Hot Water Heater Problems Hot Water Heater Repair
Signs that indicate a hot water heater is failing include: water not getting hot enough, strange noises coming from the heater, leaks or puddles around the unit, and a decrease in water pressure. If you notice any of these signs, it may be time to consider replacing your hot water heater.
Probably a bad thermostat - stuck open so the water temperature in the engine block doesn't get hot enough to make the heater warm.
The heater has a little radiator in it and it may be enough to cool a engine that is running hot
LOw coolant? Weak thermostat?
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