Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Flashing snowflake symbol and a/c is not blowing upstairs

2 thermostats one downstairs and one up. the up is flashing snowflake and is not blowing.

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Flashing snowflake normally means it is in a time delay. give it five minutes and see if it continues.

Posted on Jul 21, 2009

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2 level townhome- the upstairs is heating to 68 degree-thermostat is located but the downstairs is like 58 degrees.The vents are open in ceilings downstairs. How can we do to get more heat downstairs


close ceiling vents
the hot air down stairs rises through the vents and adds to the upstairs heating
same as hot air goes up the stairs to the upper rooms

Dec 27, 2017 | Heating & Cooling

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My upstairs temperature is 80 degrees and the downstairs is 69 Honeywell focus pro th6000 is set at 69. Why is the upstairs so drastically hot?unit is located upstairs& thermostat is downstairs


if there is no control of air movement between floors and you have it on cooling then any cold air will go down to the lower floor
or alternately if you have it set on heating all the hot air will rise to the upper floor
where is the system located (upstairs or down stairs ) and where is the thermostat located
to get control close any upstairs to down stairs doors or erect a heavy curtain across the stair well

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Snowflake symbol and filter message


That symbol usually means that the a/c unit inside the house has frozen over and it won't start working again until after the ice has melted. I would recommend hiring a repair guy for it though. I had this problem and even after it melted the a/c would still go wonky from time to time. There's a part that you might need replaced on the outside unit.

Apr 30, 2014 | Heating & Cooling

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Not enough heat


Take an Amp draw on all heaters and compare. If within 5%, they are working fine but you may have more open area downstairs than up.

Mar 03, 2010 | Heating & Cooling

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2 Rheem Protech 500 thermostats, 1 upstair & 1 downstairs with a Rudd Achiever 90Plus gas furnace. Thermostat downstairs works fine but upstairs one cycles fan on and off 2-3 times during heating...


Have you checked to make sure that all of the supply registers are open, the air filter is clean and nothing is blocking the return air grill?
It almost sounds like you could be cycling on a limit switch.
Usually on gas furnaces, the blower is controled by the onboard controls, in the cooling mode the thermostat will control the blower.
I would be looking past the thermostat, at the furnace it self.
I hope you find this helpful. If you continue to experience problems, please let us know and we will dig deeper. :)
Paul

Feb 13, 2010 | Ruud UBHC Air Conditioner

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I have 2 Thermostat's in my home. My heat works well upstairs but not downstairs. My thermostat downstairs won't come on but I unhooked the thermostat from downstairs and tried it upstairs and it worked...


Hi, sounds like you determined the problem is not with the thermostat. That leaves the furnace that serves downstairs. What type heating system do you have?

Jan 13, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

2 zone sytem main floor cooler than what i set it to


Warm air rises and if the upstairs thermostat is on it will onerride to lower the temp upstairs. To have the dowstairs thermostat govern, the up stairs must be off . The whole house will balance to the controlling thermostat.

Jun 02, 2009 | Honeywell Programmable Thermostat Heater

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Heating blowing coo air downstairs and warm upstairs?


Some of this depends on where the air handler/furnace is located. Most often in two story houses, it's in the attic upstairs, or in a closet upstairs. A duct routes air from the furnace to the downstairs supply duct, so it is a distance from the air handler.
When the unit first initiates a heating cycle, that duct is going to be full of cool air, and the duct itself will be cool. So the furnace has to run long enough to push the cool air out, as well as warm the duct up, before your going to feel warm air at the registers downstairs.

Keep in mind, heat rises. And, your thermostat only monitors the immediate area where it's located. In your case, upstairs.
Two story houses are problematic because of this. And one way around it is to have a damper system installed that distributes the air upstairs or downstairs based on a thermostat located in those spaces. There would be 2 dampers, and 2 thermostats (one upstairs, one downstairs). Each stat would control a damper, and the call for heat or cooling.

Let me know if you would like to consider a system like this, and I can point you to components to use. I've put several system like this in.

Jan 26, 2009 | Kitchen Appliances - Others

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