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Rheem air conditoner problems

Our upstairs Rheem unit seems to be keeping the upstairs about 5 degrees cooler than we set the thermostat for. Also, when it first comes on, the air seems to be warm and smells like something is hot. It's 8 years old. Any ideas?

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It might have leak and low on gas or the main PCB board is defective. try switching off and on circuit breaker ti might reset the system

Posted on May 28, 2009

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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

Dec 17, 2016 | Honeywell Heating & Cooling

1 Answer

Why can't I lower my honeywell 8500 below 67 on cool?


With a two story house you have to be aware that cold air flows downwards so any cold air coming from an ac unit will flow downstairs( normally down the stairway) so unless you can close off the down stairs then the up stairs unit will be cooling downstairs as well. Ac units have a thermostat located in the air intake and it cools until the cold air has risen to that point. In effect the space above the ac unit will be hotter than the floor. Knowing how they work ,you can see that the upstairs unit will never reach the set temperature because the cold air is continually heating from the house and will never get to the top thermostat.
So your solutions are
1-- fit controls that restrict the cold air from leaving the upper floor (Doors)
2--don't run the upper ac unit unless you are living up there (waste of money
)3 place an ac in each upper room and keep the room door closed

Aug 12, 2014 | Heating & Cooling

1 Answer

Cooler wavers between 35 and 45 degrees.....even after turning the controls to colder. Would this be the thermostat?


Probably... OK I am going to fill you in on something here that almost no one knows. The True coolers all use a thermostat that reads the coil temperature and has no idea what the box air temperature might be. They are all pretty much the same but have a few different variations. For most beverage coolers though they are getting the coil down to around 13-15 degrees and then shut off and stay off until the coil gets back up to 38-40 degrees.This means that the air temperature can be anywhere from 23 to 50 degrees at any given moment but the product temperature is going to average out in the middle. If the box is full no problem the temperature swing will not be anything like this because the product will keep the temperature more stable. If the box is empty you will need to put SOMETHING in there to help stabilize the temperature before panicking. 3 or 4 gallons of water will do. Also if you want to sleep better at night put a thermometer in a glass of water in the cooler to get a better idea what your product temperature really is and don't put too much faith in the cheap dial thermometer mounted to the outside of the box. Oh and set the dial on 5 and if that doesn't work the thermostat could be a problem... they are the weak link in these units.

Aug 28, 2013 | True T23 Refrigerator

1 Answer

Our upstairs Central AC unit will not cool below 80 degrees. Everything is blowing fine. It is 89 degrees outside today. The air coming in thru the ducts is 80 degrees. The downstairs unit blows 70...


you will need a thermometer, you can use a meat therm.take a temp reading of the air going into the return and then coming out of the supply at the unit, it should be at least 15 to 20 degrees cooler in the supply, if not it may be low on refrigerant also check filter and return duct make sure your not pulling air from attic

Jun 30, 2013 | Heating & Cooling

1 Answer

Weak air conditioner air flow and very hot upstairs.


Check the fans are all working ok and make sure there isn't a louvre closed in the duct

May 04, 2012 | Heating & Cooling

1 Answer

Just moved in yesterday and the Honeywell thermostat is not working properly. the down stairs has diffent kinds but the up stairs rooms have the Honeywell thermostat. we set the temp. to 60 degrees but it...


Sounds like the programming on your thermostat needs to be reconfigured, but I need more information like the Honeywell Model number which can be found behind the front cove, but becareful to unsnap the t-stat properly not to damage the pins that connect t-stat to its base.

Jul 25, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

I moved into a place that has a MasterCool Evaporative Cooler on the roof. The ownstairs is quite comfortable so I really only need to cool the 2nd story.... it seems as if all the cold air settles...


jbrown - Hot air rises, Cold air falls. If you have ceiling fans upstairs, turn them on to run counterclockwise at highest speed you can stand. Make sure all the windows are closed upstairs. The ceiling fans will help to keep the cool air upstairs and pull some from downstairs.

If you don't have ceiling fans, invest in a box type fan that you can place at the head of the stairs (that's the top of the stairs) run it on HIGH and it will act like an exhaust fan, by pulling cool air upstairs. It may take a while, but it will help cool the upstairs to some degree.

Hope this helped you. Please let me know. Thanks.

Jun 24, 2011 | Mastercool 67471 Evaporative Cooler Air...

1 Answer

I have a Rheem heat pump and a Honeywell thermostat. I let my air filters get too dirty, and they restricted the air flow so the system shut off. I have replaced the air filters but the upstairs doesn't...


You may need to replace the furances high limit switch. This is located abvove the burrners with the top frot door off. It has two wires going into it. The furance probably was cycling on this switch which automatically resets it self. The thermal dics wears out and starts to trip at lower temperatures. You can temporally jump across the switch and check the furances opreration but do not leave this switch jumperd because it is a safty.

Feb 06, 2011 | Honeywell Heating & Cooling

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

1 Answer

Getting cooler air


if you are desiring to have it 62 degrees in the house, the cool setting needs to be more to like 66 deg and the heat setting needs to be like 58 degrees. that would make it more around 62 degrees in the house.

change the heat setting first to 58 and then change the cool setting to 66. this gives your temperature 62 +/- 4 deg.

Jun 16, 2008 | Computers & Internet

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