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Why does your central air unit blow warm air then blows cold air?
Wiki User
∙ 14y ago
Because the air handler and ductwork are full of warm air from not running and cooling is not instantaneous upon start up. It takes 2 or 3 minutes of run time for the unit to begin cooling.
Wiki User
∙ 14y ago
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Why does your central heat blow hot then cold?
Had the same prob. A lot of units 10 years or less have two separate heating strips when you first turn on the unit both are active once it reaches desired temp it alternates between the two to save on power. If one of these is bad it will blow cold when it cycles to it and warm back up when it switches to the other if it is still functioning. Hope this helps
Why is your central air conditioner leaking water in the house and it will not blow cold air?
The evaporator coil is probably frozen. Shut off the outdoor unit and run the fan only until it thaws out. Then call the service man and tell him what you did, there is no point in paying him to stand around while the ice melts and there is nothing he can diagnose until the ice is gone.
Why is your central air conditioner unit outside but you central heating unit inside usuially in yer basement?
The outdoor portion of the central ac unit is what gives up the heat from indoors, so it has to be outside. For a more thorough explanation see the question: How does air conditioning work.
'why does the fan still run on the unit after it cycles is over. But it is blowing hot air not cold?
why does the fan still run on the unit after it cycles is over. but it is blowing hot air not cold
What could be wrong if my central air conditioning unit outside is buzzing every so often and inside is blowing air just not cold air?
your outside unit is buzzing because the low voltage control signal is activating the switch " the contactor" but your unit for some reason is not starting thus no cool air. either your circuit breaker is tripped or you may have other more serious problems. call a licensed hvac service contractor.
Why does your central air unit blow cold air for only a few minutes then blows warm air?
why does ac blow warm air? why does ac blow warm air?
2nd floor blows cold air no heat?
Check upstairs heating unit.
When heater is on it blows cold on drivers side and hot on other side?
Your average A/C unit blows heat through all vents.
1989 Grand Marquis AC blows ice cold idling but blows hot while driving but blows cold when decelerating?
it could be the heater core and ac housing unit that allows hot air to be mixed with the cold air or it could just cancel out the cold due to the motion of the car
Will a bad thermostat causes a heating unit to blow out cold air?
If the unit started it`s probably not the stat.
What causes my ranger to blow warm air while idling and only blows cold air when revved up?
unit could be low of refridgent,or valve for heater not closing complety There can be other problems, but these twowould be the ones i would start with.
Central air blows cold for about 15 minutes then blows room temp Outside unit sounds normal at startup but after 15 minutes makes an almost high pitched noise what could this be?
Check the filter. If in doubt filter is working , remove filter and verify A/C continues to mal-function.
Central air not blowing cold air?
There are a few reasons why a central air unit is not blowing cold air. The coils may be dirty, the unit may need freon, or the thermostat could be broken.
Have a vulcan ultra 30 under floor ducted heating unit and it blows cold air and the igniter unit fires and fan blows but the burners will not light ignite but it keeps blowing cold air any sugg?
check your thermocoupler. It will not let the gas flow if it is faulty. Easy fix too.
What is wrong if your home heat pump system blows hot air fine but won't blow cool air?
If the unit works in the heat mode, then the problem is usually located in the outdoor unit.
Why doesn't the ac blow cold on my Chevy s10?
You may need to recharge the cooling chemical in your unit.
Why would the central ac blow cold air for about 30 minutes then start blowing hot air but the unit isn't frozen and is full of refrigerant?
It could be that the unit is overcharged and the compressor is shutting down on overload. Check to see if the compressor is running when the hot air starts blowing.
