I have a two story house and I can't get the upper level cooler than 72 degrees on a hot day. Downstairs cools to 67, but I can't turn thermostat down any lower than 67. Why can't I turn it down lower?
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
SOURCE: Overheating
that would indicated your thermostat is stuck, the other possibility if this is a 4.6 liter that the head gasket is leaking and there is an air pocket not allowing the thermostat to open but i would start small with the thermostat these 4.6 motors love head gaskets so don't overheat it too much more please rate -jeff
SOURCE: 2002 Sedone Air Conditioner not coooling enough
if you have had it checked give me the readings of the high and low pressures with the engine running and i can tell you if you have a fan problem ....but it must very accurate [email protected]
SOURCE: Low Coolant light flashing on 1996 Buick Regal 3.8
The low coolant sensor should be located in the passenger side radiator tank, You need to take it out and clean the sludge off of it for it to work right. Or you can just unplug it and forget about it, the light will go out and it won't cause any problems.
SOURCE: how much to replace a
In this sectionyou can find the details about "how to..": ZJ-Secc-7-Cooling-System
Good luck!!!
SOURCE: Bublling in the thermostat housing and very hot upper radiator hose
I recommend flushing the radiator thoroughly if not done recently. there seems to be some sort of blockage in the radiator at this time. if you get lots of metal fragments that are flushed out during this flush, i will then recommend a rebuild on the radiator or replacement of the radiator. make sure the cooling fans are cycling on time as well.
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