RAV4 Prime Heating Problems: 5 Reasons and Solutions!

Bought a RAV 4 Prime a few months ago but already facing a couple of issues? Worried about the heating not working from time to time? 

We can understand why you’re nervous with winter just a few months away. No need to fret, we can help.

So, what are the reasons behind the RAV4 prime heating problems?

The main reason behind the RAV4 prime heating problems is broken thermostat. It needs to be replaced if that’s the issue. Also, using wrong coolant or no coolant can cause the problem. You need to use the right type and amount of coolant for that. 

Have we gotten your interest already? Why don’t you continue to read on if you want to learn more?

5 Reasons Behind RAV4 Prime’s Heating Issues

Toyota RAV4 has several issues. RAV4 Prime heating issue is just one of those. Here’s a RAV4 user faced several backlash after buying it.

We’ve covered the 5 reasons behind RAV4 Prime’s heating problems and their solutions. 

Reason 1 of 5: Thermostat

The thermostat is the first item to examine if your vehicle isn’t producing warm air. This is a relatively simple fix, and you might be capable of changing the RAV4 thermostat yourself. Thermostats degrade and might become stuck in an open or closed state. 

As a result, the heater fails to function effectively.

In fact, this component is responsible for warming and cooling the antifreeze in your vehicle. A faulty thermostat can cause both overheating and overcooling of the vehicle. However, it is entirely dependent on how weathered it is.


Disconnect the thermostat and the two or three screws that keep the gooseneck in position. Wipe the motor, and the gooseneck seals afterward. Treat one surface with RTV sealant if you received a plain cover from the detail shop.

The thermostat and gasket should then be installed. The previous thermostat may have a rubber O-ring as opposed to a seal. In that case, grease the new one before inserting it. Replace the gooseneck and refill the antifreeze.

You could always take your car to a mechanic if you are not comfy fixing it yourself. 

Toyota RAV4 thermostat maintenance costs approximately $300 and $345 on average. Labor costs are projected to range between $159 and $200, with parts costing between $141 and $145.

Reason 2 of 5: Coolant Issues

A heater core circulates lukewarm water from your cooling to the heating system. As air travels through, this base will increase the temperature, giving warmth to the vehicle. If your fan is circulating airflow but not getting warm, there are a few things to examine.

Your cooling system may have low fluid levels. It will not reheat if there is insufficient coolant to reach the heater core. Ensure the fluid levels in your radiators and external fuel tank are adequate.

You may have a leaking radiator or hose. Air bubbles in your cooling system might also be a source of concern. If the temperature of your engine changes while traveling, your engine may need to be “burped.” It must be completed for the air to be eliminated.


Simply remove the lid of the excess transparent tank. And pour in the antifreeze until it meets the whole level. After that, you have to reinstall the cap and tighten it, and you’re good to go.

Reason 3 of 5: Gunk and Grime

The presence of gunk and filth in the coolant system could lead your vehicle to overheat. The antifreeze in your car aids in controlling the heat. 

As a result, this can have serious consequences. When silt builds up between the coolant and the heater core, it inhibits coolant flow.

The buildup of dirt in any part of the vehicle can lead to serious issues. Dirt getting stuck in the anti-lock braking sensors led to RAV4s losing traction control.


This is likewise a simple remedy that usually only requires a coolant system flush. In exceptional circumstances, the accumulation may necessitate tubing replacement. 

Your mechanic will be able to assess the system for you and efficiently repair the coolant lines. 

The average cost of flushing coolant from a radiator ranges between $100 and $200. The exact price may likely vary depending on where you go.

Reason 4 of 5: Heater Core Problems

Car heater issues are often related to heater core issues. These issues include- 

  • antifreeze may not be flowing correctly through the heater; 
  • airflow from the blower also isn’t accessing it; or, 
  • there is a blockage in the heater core’s tiny piping.

Heater cores are cooling system components that simulate tiny radiators. A heater core is constructed of brass or aluminum tubing. It transports hot antifreeze in and out and fans that dissipate the heat produced by the coolant.

A heater core is in charge of the temperature control and heating functions. Heater cores are often found in the back of panels. Suppose your automobile isn’t pushing excess heat into the interior and the coolant level is satisfactory. 

In that case, you may have a heater core problem.


A novice may find it difficult to replace a car’s heater core. Because it can take up to 6 hours for two guys to work on it. That is why we usually advise consulting a specialist. However, if you want to do it yourself, watch this video:

To have your heater core repaired by an expert, you may have to count some cash. The total cost of components and labor may vary between $800 and $1,000. Labor expenses vary, so make reservations and get multiple quotes from repair firms. 

If you repair the heater yourself, you will simply have to pay for a new heater core. It will cost you between $100 to $300.

Here are some recommended good-quality heater cores for you. 

HVAC Heater Core for RAV4Check the Price on Amazon
A-Premium Front HVAC Heater Core Compatible with Toyota RAV4Check the Price on Amazon

Reason 5 of 5: Water Pump

Suppose you glance at your digital thermometer and notice the engine operating with more heat than usual. Yet, there is no hot air from the heater. 

In that case, they may be experiencing water pump problems. Try shifting out of position and accelerating the engine a little.

Suppose the airflow begins suddenly becoming heated for a few seconds. In that case, this indicates a faulty water pump or low coolant. Also, if the conveyor belt connecting to the water pump breaks, it cannot turn as rapidly as it should.


Water pump repair is a complex procedure that should be performed by a specialist. Unless you have mechanical competence for that. 

First, the car’s preexisting antifreeze is emptied. And any items that hinder accessibility, such as the timing chain or belt, are replaced. 

The water pump and its associated components, such as hoses, are examined and, if necessary, upgraded.

The thermostat, radiator cap, and any valves or covers should be modified at this point. If the radiator spills or shows symptoms of wear, it should be replaced. 

Finally, new antifreeze is injected, and the system is leak-tested. A test drive will establish that the new water pump is working correctly.

Toyota despite building smooth hybrid vehicles. The RAV4 Prime malfunctions continue to plague Toyota and the RAV4 brand. 

Frequently Asked Questions (FAQs)

Is the Toyota RAV4 prime suitable for snow?

The RAV4 Prime handles well in slick weather. Some YouTubers have posted videos of their vehicles performing well both off-road and on snowy highways. Don’t worry about driving in a Toyota RAV4 Prime in winter weather.

Is there anything wrong with the Toyota RAV4?

Many consumers reported gearbox issues, according to Car Complaints, while the NHTSA cites scores of fuel equipment failures. Although this may not apply to all, critically examine vehicle history data. Consumer Reports does not suggest purchasing the 2019 Toyota RAV4.

Which RAV4 should you stay away from?

Toyota RAV4 years to avoid are 2019, 2013, and 2006-2008. These are the ones with the most well-publicized issues. But remember that these are Toyotas, which are famed for their dependability. Their few flaws won’t put you in poverty if you buy one in decent condition.

Final Words

We’ve covered everything that you need to know regarding the RAV4 prime heating problems. The reasons and solutions that we’ve provided should help you figure out what to do going forward.

If you think we missed anything let us know in the comments. Good luck!

Robert Lozano

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