Question about Haier CWH18A Commercial Cool 18,000 BTU RAC Electronic Control Window AC Air Conditioner w/ 16,000 BTU Heater - R-104A Refrigerant, 4-way Air Flow, 3 Cool Setting, 3 Fan Setting, 24-Hour on/off Timer, Auto Restart, 208230 Volt. Covers 700 - 1,000 sq ft

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HBQO7H-J AC/Heater cools fine but the heat stopped working

Older unit has worked fine but the heat just stopped working after being off over the weekend

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SOURCE: carrier central airconditioning heat unit - breaker trips when cooling turned on

well mineswas a blowen compressor

Posted on Jul 19, 2008

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Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


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2003 mazda 6 heater has stopped working


Air Temperature Control Blend Door Failure No Heat or no AC (dependes on where door sticks)

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.

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My ac was working fine then one day it stopped and now only hot air blows out the mechanic said the ac is fine and works good but there is a vent door that switches the ac to heater and he said it was...


There is a blender that controls the air flow to go through the heater core for heat, and the evaporator for AC. It very well could be stuck.

You maybe able to try and get it to get unstuck by running the cars AC and switching from heat to AC back and forth and see if it gets unstuck. Just turn it on full blast and go from heat to cool.

If that fails, then you may need to service it. There should be a Lever Marked VENT under the dash, usually by the Brake and other pedals on the Driver's Side. Close the VENT and that will stop the Air from coming in and leave the A/C Blowing through the outlets(Vents).

I also read this online if you have an electronic climate control. "On climate control press off and heat button and let go quickly. Then press automatic. The display will start rotating eventually displaying a code 025,125 , 024 etc. Then press defrost to stop. You may hear blend door operating atb that time. It worked for my climate control."

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88 Celica has no heat. AC works fine. Any ideas


the a-c and heater run on 2 different systems the heater needs coolant going thru the heater core to make heat by blowing air through it and the a-c uses it's own sealed system to cool the air so if you have no heat / it has nothing to do with the a-c working or not . first thing you do is check the cooling system like rad and coolant levels . you will have heater core hoses running from the engine to the firewall going to the heatercore . grab the heater core hose and feel if it's hot . if your hoses are hot then the heater core is bad or the blending doors are stuck .

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When the snowflake is blinking the thermostat in in a delay mode designed to protect your compressor. If it does not stop blinking in 15min the stat is bad otherwise something is wrong with the AC

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Thermostat just stopped working.


is the tstat in cool mode? if not hit the mode button untill cool pops up then hit the down airow untill desired temp. sometimes the thermostat has a 5 min delay so be patent. If unit still does not run call the service co. and find out about how long they warranty their service call. usualy one month.

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Honeywell thermostat display has flashing snowflake /ac not working


the flashing snowflake is it telling you its in % min delay if it doesnt stop flashing within 5min it may be a bad tstat. if it goes solid and the unit is still not working its probably not the stat

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Very little heat from heater


the selector flap is not moving all the way to cold or hot position. Under the dashboard on the passenger side is a heat/ac box where all the duct work for the vents originates from. inside that box is the radiator for the heater and the cooling coil for the ac. the selector flap between them is stuck or not moving all the way.

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