what would cause one vent not to work in a 2017 toyota rav4

One of the well-nigh common (and inconvenient) problems with the Toyota Rav4 is when it has no estrus coming from the heater. Not having a functioning heater makes driving much less comfy, and can be a sign of certain problems.

At the simplest level, there are two main reasons why the heater is non working.  If information technology's not coming on at all, it'southward commonly either the blower motor or some other wiring issue.  If the heat is blowing, but blowing common cold, information technology has something to exercise with the coolant getting to the heater core, or the heater core itself.

Rav4 No Heat:  How the Heater Works

At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core.  At this point, the blower motor blows air beyond the it and the newly heated air blows on to the driver and passengers.  If the heater has stopped working in your Rav4, this procedure has failed in one manner or another.

Toyota Rav4 Heater Not Working:   Diagnosis

A word of circumspection:  If there is no coolant in your overflow, you can refill it by adding more than to the overflow reservoir.  There is nigh never a situation where you lot would need to accept the radiator cap off of the radiator to add coolant. The exception to that would be when you would have reason to believe that the hose going from the reservoir to the radiator is clogged. Anytime yous're putting your hand around the radiator or fans in the engine assume that they are hot and that the fans tin can boot on at any time, fifty-fifty without your key in the ignition.

Low Coolant

While not having enough coolant may brand your engine run hotter, it tin can besides cause your Rav4 to not be able to create enough heat.  Is there isn't plenty line pressure, due to low coolant, then the heater core volition not be able to get whatever coolant itself.

You can verify this past checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top (usually right past the radiator cap).  It should have separate lines to point "cool hot" and "cool cold".  Some vehicles only accept full hot.  Never bear on the radiator cap unless the vehicle is Water ice COLD.

Bad Thermostat

The chore of your Rav4's thermostat is to regulate the temperature of the engine.  It does this past assuasive water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up.

Sometimes when a thermostat goes bad, it stays stuck open.  This allows the coolant to continuously enter the engine.  When this happens it'll feel like the oestrus is barely working, or you may notice that it'll work if the vehicle isn't moving, merely if yous get on the highway it stops working.

If your Rav4 has a built in temperature judge, have a expect at information technology and meet if it is in the spot it is unremarkably in after a bit of driving.  If information technology looks similar it is colder than normal, that'south a pretty good indication that at that place is something incorrect with the thermostat.

Heater Core

The heater core itself tin can go bad.  Over fourth dimension, they are known to clog and fail.  If you have a heater core that clogged, it's not going to be able to pass coolant through.  Without the warm coolant going through it, there can be no heat.  A bad heater core tin can also leak, and then watch out for that.  Feel your rider floorboard to run across if it'due south wet.

Heater core'south are typically pretty affordable.

Hose to/from the Heater Cadre

There are two hoses coming to and from the heater core.  They both should experience warm or hot to the touch with the engine on.  If one of the hoses is hot, and the other i is cold, that is a pretty adept indication that the heater core is clogged.  If the neither hose has any heat, you may take air in the cooling system, depression fluid, or low force per unit area.

H2o Pump

If you wait at your temperature gauge, and the engine is running hotter than normal, just there is non heat coming from the heater you may be having issues with the water pump.  Try taking the vehicle out of gear and revving the engine a little.  If you lot feel the rut commencement to blow hot for a few seconds that's an indication of a bad water pump or depression coolant.  Also, the serpentine belt going to the water pump going bad can it non plow every bit fast as it needs to.

Here'southward symptoms of a bad h2o pump from Autoblog.

Conclusion:  Heat Not Working Toyota Rav4

It can be tough to find why your Rav4'due south heater is blowing common cold.  But, using the info above about how and why a heater would fail can make it a lot easier.  If there is annihilation you would similar to add, delight feel free to get out a comment below.

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Source: https://www.700r4transmissionhq.com/toyota-rav4-no-heat/

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