Question about Hyundai Sonata Hybrid

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I replaced the heater blower under the dash and its blowing very little air out and it not very hot please help

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The heater core could be plugged up or the temperature mixing valve could be defective. Also there might be a restriction in the intake part of the heater assembly. There may be debris in the intake where the air is pulled in from outside or from the cabin.

Posted on Mar 11, 2011

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Why is heater not blowing hot air on 99 chevy blazer


if the fan blower is working then it must be the heater valve inline with the heater hoses. Or the selector on the dash has broken and is not connected at the back. You have tried everything else. You were correct in what you wrote above and have tried so far

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2002 nissan altima heater problem


have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!

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Blower blows but no heat


there is a flapper door that is controled by a little servo motor under the dash that controls the mixture between hot and cold depending on where u have the control set. sometimes when that stuff goes out you may hear a thumping sound under the dash... problem could be in temp control switch, the air mixture control door motor,,, if not......heater core could be stopped up or bypassed underhood

Sep 15, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

My air conditioner blows hot air and my heater blows cold air. The heater will warm up after the engine has been running for awhile but when I turn the air conditioner on it takes power away from the...


check your blower motor under the passenger side of the dash, round plastic box three screws pull it out something might have fallen though your cowl and chewed up the fan blades. as for the ac your r-12 is probly empty or has a leak bring it to a local garage and have them flush and fill your cooling system. heater would be your thermostat not openig properly, by far your cheapest fix under ten dollar part.

Apr 04, 2012 | 2000 Toyota 4Runner

1 Answer

What should i do when the hot air doesn't work


does the air not blow when it is turned to hot or does it blow but just not hot? If it blows but not hot you need to replace your thermostat and heater core which looks like a little radiator under your dash.

Jan 21, 2012 | 1998 Oldsmobile Silhouette

1 Answer

2001 mitsubishi galant heter dont work blows cold replaced thermostat and radaitor still cold


There is probably some kind of damper that opens and closes under the dash that allows the air from the blower to be blow across the heater core under the dash. Sometimes these are controlled electronically or by vacuum tubes. Look underneath the dash and look for small vacuum hoses that might be dangling loose or possible little wire cables that might have come off the sides.
Possibly check Haynes Manuals (www.haynes.com) to learn how to change a Heater Control Valve.

Dec 15, 2011 | 2001 Mitsubishi Galant

1 Answer

Not blowing out hot air, changed themostat heater hose, blower works fine,also flushed out readiator,there is no indication of any leak from the heater core underneath dash board of any antifreeze..?


#1 could be the dash temp control not working(not very common) #2 could be the warm/cold air door motor not working , this is located under the dash.

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Dec 01, 2010 | 1997 Buick LeSabre

2 Answers

When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

2 Answers

My heater stopped blowing this morning.


Your heater blower fan unit is in need of replacement.
It's a difficult job so take it to a service center.

Jan 29, 2009 | 2002 Chevrolet Tahoe

3 Answers

Heater blowing cold air.


Check the water contol valve operation ( under hood connected to heater hoses), do you have a full load of coolant?, also air mix door under dash, is the temp of the coolant hot?.Check them all out, you'll find it

Jan 03, 2009 | 2001 Volkswagen Passat

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