Posted: 5/14/2013 1:51:09 PM EDT
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running.
No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but blow air not quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. |
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cieling fans maybe,
I've been dealing with a bad capacitor the last couple days, so I've had to manually turn my ac on and off then manually get the compressor fan running. As a result, I'm only starting the ac every few hours. To keep things comfortable, I turned all my cieling fans on low but in the correct direciton (drawing air up). I noticed a huge difference in the the way the house feels. |
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Hopefully you might be able to get an HVAC guy to ' test run' several different thermostats-
After pissing off more than one contractor, while trying to dial in my new furnace/air system, I finally got the idea to change t-stats. Right before I got the new system, I picked up a replacement t-stat at the local home center, contractor(s) asked if it was new, and said it was fine to use. Long story short, all thermostats are not alike! A one degree swing setting will not allow the furnace unit to operate properly, and many lower cost t-stats are set that way in the package. The third contractor out here helped figure that one out- furnace (or a/c) would run FOREVER, and short cycle, throw errant codes, shut down suddenly, etc. We tested a few before deciding on the one I have now. Whole system runs EXCELLENT, and uses less energy now as well, obviously. The original installing contractor ate his lunch on this install, replaced circuit boards, brains, etc., never looked twice at the t-stat. So did the other 2 " repair specialists" If I had not called Bravo Sierra on half of their ' ideas' I would have spent a fortune! Hope this helps, I know it's a PITA! |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Is the blower motor a 2 speed. It may be on high speed and can be lowered |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Needs better stat. Maybe change blower motor from high to med on control board? |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Needs better stat. Maybe change blower motor from high to med on control board? Would it cause the compressor coils to freeze up if the blower speed is reduced while keeping the compressor running at the current speed? |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Needs better stat. Maybe change blower motor from high to med on control board? Would it cause the compressor coils to freeze up if the blower speed is reduced while keeping the compressor running at the current speed? No. Just less air across the coil. I'll bet black is on high (cool) and red is on heat (low) and blue ( medium fan speed) is 'parked'. Swap blue with black with power off. |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Needs better stat. Maybe change blower motor from high to med on control board? Would it cause the compressor coils to freeze up if the blower speed is reduced while keeping the compressor running at the current speed? No. Just less air across the coil. I'll bet black is on high (cool) and red is on heat (low) and blue ( medium fan speed) is 'parked'. Swap blue with black with power off. Would a lower blower fan speed set to medium effectively reduce the humidity vs using the high fan speed? |
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I recently bought a two story house that was built in 2007. The house has two heat/AC units, one for upstairs and one for downstairs. The problem I am having is with the upstairs AC unit. When the AC turns on, it blasts freezing air into the room which makes the room feels very cold while the air is blowing, then the unit satisfies and turns off, then the temperature seems too warm until the unit turns back on. The builder cheaped out and just ran two 8"x10" side-wall vents into the game room, which is about 15' x 22'. The unit also supplies the upstairs bath (one vent) and upstairs bedroom (one vent). So 4 vents total for a 2 ton unit. All of the rooms get freezing when the AC is running. No matter what I set the thermostat on, I cannot get it to feel comfortable. Is there a way to make the AC run longer but not blow air quite as cold? Maybe a lower setting on the compressor? The thermostat is one of those programmable Honeywell units. The upstairs unit is a 2 ton Carrier. Needs better stat. Maybe change blower motor from high to med on control board? Would it cause the compressor coils to freeze up if the blower speed is reduced while keeping the compressor running at the current speed? No. Just less air across the coil. I'll bet black is on high (cool) and red is on heat (low) and blue ( medium fan speed) is 'parked'. Swap blue with black with power off. Would a lower blower fan speed set to medium effectively reduce the humidity vs using the high fan speed? Humidity? No. That kinda is what it is. Less air, less heat being pulled from the air, so less capacity. Need to know air temp at register, air temp at return, suction temp (fat line at condensing unit) , and suction pressure to properly check sub cooling and super heat to know how happy your entire system is. |
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Was the unit properly sized to the square footage? The total square footage of the upstairs is 750 square feet. Unit is two ton. I seem to recall hearing that you should have 1 ton per 500 sq. ft. So it sounds like the AC unit is somewhat oversized. It is not all about square feet, it is more about load. For instance I have a 3ton unit for 2430 sqft. The house and the load only require around 2.5 ton unit for my place, but they opted to install the 3 ton for those busy days when doors are open and shut a lot (cook outs) |