Question about 2005 Hyundai Tucson

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2005 hyundai tucson blows cold air on right side when heater is on

The thermostat is fine and the coolant level is fine, the passenger compartment air filter is new, but it blows cold air from the vent when the heater is on

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Actuator motor for mode door is not working.

Posted on Nov 19, 2013

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Posted on Jan 02, 2017

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dttech
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SOURCE: Why doesn't the heater blow hot air?

If your "Check Engine" or "Service Engine Soon" light is on, you need to have that checked out first.
If not, the next thing you should check is your engine coolant level. (Antifreeze) If the coolant level is low, the engine coolant does not circulate through the heater core and the the heater doesn't work. The coolant level could be low for a number of reasons including a leaky hose, water pump, or head gasket. In any case, if it is found to be low, you need to find out why.
If the coolant level is OK then the thermostat function needs to be checked to make sure that the engine is reaching operating temperature.
If all of the above checks out OK, then the heater control valve and/or the blend air door in the HVAC housing needs to be checked for proper operation. (NOTE: some cars are not equipped with a heater control valve)

Posted on Oct 10, 2009

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SOURCE: how many bolts on the thermostat housing?

should just be two bolts, one on each end of the housing

Posted on Oct 08, 2009

ghost4548
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SOURCE: Hyundai Tucson a/c starts out

The issue you describe can be caused by several possible conditions. The best advice I can offer is take the vehicle into an authorized Hyundai Service Department to have it properly diagnosed.
The worse thing about chasing parts is you may or may not just get lucky on the repair. Then again you may end up shelling out $100's of bucks before you actually hit on the cause.
Possible Causes
1. Malfunctioning thermostat in the evaporator - monitors evaporator temperature so it doesn't freeze over.
2. Malfunctioning A/C control head (panel)
3. System is possibly UNDERcharged (insufficient refrigerant)
4. Malfunctioning Tripple Switch (the switch monitors pressure in the system: i.e., if pressure is too high, it will shut down the A/C; if pressure is too LOW, it will shut down the A/C) If this switch is malfunctioning, it can cause the symptom you describe.
5. Engine Coolant Temperature Sensor malfunction - if the sensor is lying, telling the engine computer that the temperature of the engine is above 230 degrees, the computer will shut down the A/C.
This is why you should have the problem properly diagnosed.
Hope this helps.

Posted on Jun 28, 2011

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It just blows cold air. no hot air


First, make sure your coolant level is full. After spending some time looking around you probably have a shut off valve in the engine compartment. See if you can locate 2 black(sometimes red) heater hoses, about 1 1/4 inches in diameter, coming from the firewall on the passenger side. The heater control valve is located inline with the hoses. It turns on and off the flow of hot water through the heater core which radiates heat in your passenger compartment. Check with your parts house to verify this by looking up the control valve.

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My heater isn't working..how do i fix it?


Here's a list of possible culprits:

Priority Action Part Type Cause
1 Inspect - Antifreeze Needed - Coolant Level Low.
2 Inspect - Heater Control Valve - Leaking or Faulty Heater Control Valve.
3 Inspect - Thermostat - Thermostat Stuck Open.

First thing to check is your engine coolant level - quick and free.
Since your blower works, my nominee for the offending part would be the Heater Control Valve, which redirects hot coolant into the passenger compartment heater core. Without hot coolant, the blower will just blow cold air, since the heater core isn't getting the needed flow of hot coolant through it.
There may also be a fault in the "Temperature Valve Actuators" (there is a right hand and a left hand version of these - one for each side of the car).
The Right hand Temperature Valve Actuator is AC Delco part #15-72971.
The Left hand Temperature Valve Actuator is AC Delco part #15-72972.
Their pictures are available in the online AC Delco Parts Catalog at:
http://parts-catalog.acdelco.com/catalog/catalog_search.php
Here are your parts search parameters:
Vehicle: 1996 OLDSMOBILE AURORA V8-244ci 4.0L F/I Vin C ID# 17739
Group / Subgroup: Heating/AC / Heater Core and Htr Control Vlv

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You didn't specify what type of vehicle.
If you have very poor air flow out the vents, later model vehicles have a hepa filter or cabin filter in line form the blower motor to the vents. It can be plugged quite easily and drastically cuts down the air blown into the vehicle. Check to see if they are plugged. Secondly, Check your coolant level in the rad and reservoir. If the windows fog up when cold and air flow is good it could indicate a leaking heater core. Check the passenger side floor for signs of coolant again I don't know the type of vehicle, some heater cores are located at the firewall under the hood.

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If the temp gauge is hot and cold air is blowing in the passenger compartment, then I would say there would be a blockage or series of blockages in the cooling system. Flush it out and refill with new antifreeze/coolant mixed at 50/50 water to coolant concentration.

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