My legacy is constantly putting out heat, my fan switch still works for the speed, but the heater is always putting some heat into the cab. I move the temperature selector, and watched under the dash to be sure the cable is moving the lever which it is fully. What else can it be, I am not wanting to remove entire dash unless necessary. Any help I would appreciate. Thanks
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Sound like the blend door behind the glove box is stuck. My problem that it was stuck in the closed position so I was not getting any heat. I had to take it to the repair shop and they took off the dash to get to it. It was expensive.
cab heater? there are 3 fans, engine,cab heat and A/C. so....
a stuck CAB switch is a bad switch. easy huh?
if the switch only works on high but does move, that is a bad heater fan Resistor block. (usually bolted to fan hosing as it is air cooled this part)
if your heater constantly blows cold then there is a problem with water circulation I:e the heater has a small radiator like your engine has a large radiator the small heater radiator is called a matrix instead of just cooling the water passing through it like the radiator for your engine it is designed to give heat via a fan that blows through it so when it fills with hot water from the engine bay the blower fan blows through it thus giving heat inside the car if it is blowing cold then there is no water getting to it or the water is low in engine bay or there is a blockage even possibly a leak or quite simply the switch that controls the flaps to give you hot or cold air is stuck in the cold position with out more info and me asking more questions this is the basic idea of how it works hope this helps
Need to check the coolant level to ensure that it is full. If full, check the hoses going to the heater core. Both hoses should be hot. If one is much colder than the other, you have a stopped up heater core. If that is fine, check to be sure the engine is getting as hot as it should. A stuck open thermostat will not allow the coolant to heat up enough and not blow hot air. If all that is good, check the blend door under the dash. It may be getting stuck in between the hot cold positions and not allowing all the air to flow over the heater core.
it's either because your coolant isn't hot enough or your heater core is clogged and needs to be replaced.. you might wanna replace your thermostat.. because if thats stuck open then your coolant will constantly be cooled .. and thats not a good thing!!
hi from uk can i offer this advice ? when you start engine let it warm up a little then drive untill temp guage reads warm at least ? then when you put front screen defrost on only select screen and No 2 speed then as temp reaches normal screen will clear fully if you select full speed on heat blower to clear screen at first start it will not work because the coolant from engine passing thro the heater matrix/radiator will be rapidly cooled by fan of heater TRY IT? in years gone by it was common remedy if you were stuck in traffic and temp rose towards hot you could cool system down by putting heater on full heat and the fan on max this cooled the engines coolant as it passed thro the heater ?hope you understand how heater/fan should work for optimum efficiency my wife has owned 2 of these accents and never had heat/demist problems it is surprising how many people consider the demist/heater systems are poor on many cars not just hyundai hope this helps best wishes
I know this problem all to well as i am a Ford dealer tech, the problem is caused by either a defectice air temp control blend door actuator motor or a stuck air temp control blend door or in rare cases both, your system's door is stuck n the heater position, which is where they almost always fail.
Alot of people have the same problem with the fan switch and blown bulbs. There really is no fix for this. Jeep really screwed up when designing the heater control assembly. The cheapest solution is to buy another unit off Ebay. Can always go to the dealer but be ready to PAY for there mistakes.