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Snowflake blinking and air conditioner won't turn on.

Snowflake is blinking on the thermostat and my air conditioner won't come on. What does this mean?

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  • Dennis Boxerman May 11, 2010

    It really depends on who made the t'stat. Usually, it means that the unit should be running in the cooling mode. Let me know the manufacturer and any other info of the t'stat.

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If it is blinking it is in a 5 minute time delay.
It should settle to a steady snowflake after 5 minutes and come on normally.

Posted on May 25, 2009

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1 Answer

Air conditioning not working. Have White-Rodgers thermostat 1F79111, I think. Replaced batteries. Now have flashing signal like an asterisk. What does it mean?


Blinking snowflake means it's on time delay for cooling to come on (usually 5 minute time delay to prevent compressor short cycling). Solid snowflake means cooling is on

Aug 03, 2016 | White-Rodgers (Protech) White Rodgers...

1 Answer

Flashing snowflake


The flashing snowflake means it is in the cooling mode, but is waiting for itself to 'time out' after a call for cooling. It should be about a 5 minute delay then should come on automatically. At that poing, the flashing snowflake becomes steady.

Try it one more time and set the timer on your smart-phone to ten minutes before you touch it again. If that time elapses and no cooling and it is still flashing there's possibly a problem in the thermostat that will necissitate replacement.

Aug 02, 2014 | Honeywell Heating & Cooling

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Honeywell Thermostat RTH110B


It probably has stopped outdoor unit and the blinking is to be done when working anamoni.afto heating and not to bring in cold air flashes the LIGHT as long heated air into the condenser.

Nov 01, 2011 | Honeywell Electronic Programmable...

1 Answer

I have a digital Honeywell thermostat that has a blinking snowflake. When the thermostat is on auto mode it does not turn on. When I turn the thermostat to fan I can feel and hear the air blowing out of...


If the thermostat has a blinking snowflake then it is in time delay mode which sometime can take between 5 to 7 minutes before it will turn the AC and Fan On......Then it will go to a solid snowflake.
When you turned it to fan On it starts the Fan right away..... After the snow flake has went to solid check to see if the fan is running and then look outside to see if the Fan Blade is turning on the AC..... The fan blade comes on the same time as the compressor does. Then with the fan running hold your hand above the air stream above the AC and if you can noticeablely feel warm to hot air comeing out the Top then the compressor is running also. If the outside unit is not running I would check to make sure the Main Breakers are turned ON.... After the AC has ran for a few minutes feel the copper lines that go into the house the smaller line should feel warm to hot and the bigger lines with insulation on it should feel cool to cold and sweating with beads of moisture on it..... That is a quick test to see if the unit is working properly.....If you have a Thermentor and can Check the Temperature of the Return Air and the Supply Air .. You should have about 20 Degree F Between the Supply and Return........ 75* Return - 55* Supply would Equal 20* TD Across the Coil......
That is about all you can do to check on your own....... If the compressor is not coming on or the lines are not the temperature difference then you will need to get professional help for your Air Conditioning System..... Goood Luck Hope this Helps.........

May 14, 2011 | Heating & Cooling

1 Answer

My outdoor AC unit is not coming on. Air is blowing out of my vents inside but the snowflake symbol on my thermostat is blinking and the air isn't cold. The fan on the unit isn't even running. Any...


check power to outside unit, check if it has a fused disconnect, if you have power and no blown fuses it could be a blown capicator that starts the fan and compressor...............

May 09, 2011 | Heating & Cooling

1 Answer

My nit will not always come directly on.It takes


propably your unit is inverter,if it is has auto diagnosis and you must see this from the remote control.

May 05, 2010 | Heating & Cooling

2 Answers

I have a blinking snowflake icon on my air conditioner, my air will not work. My heater will work fine but the air will not come on


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

Sep 26, 2009 | Honeywell Electronic Programmable...

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Re: 1998 Mitsubishi Diamante Air Conditioner problem


check the refrigerant it might have 2 be recharged

Aug 18, 2008 | 2002 Mitsubishi Galant

1 Answer

Snowflake blinking in one zone


i saw that my snowflake was blinking while the unit was in the 5 minute lock out state (after power up), but went to steady after that.

Jun 14, 2008 | Honeywell Heating & Cooling

2 Answers

My Honeywell rth230b thermostat continues to give me a flashing snowflake signal and will not allow the AC to turn on.


Your snowflake should flash for about five minutes, that is the time delay built into the thermostat. It should stop after that and your system should begin to function.

May 28, 2008 | Honeywell Heating & Cooling

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