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Not switching over from heating to cooling

Not switching from heating to cooling

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Check stat, reversing valve and /or refrigerant charge.

Posted on Feb 25, 2012

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Posted on Jan 02, 2017

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1 Answer

Color code for theromstat


Wiring Examples and Instructions
How-To-Wire-It.com
Basic or Common Connection Points
Terminal Colour Signal-Type Description C Black 24 Vac Common Common side of 24 Vac Transformer See Diagram below R or V red 24 Vac Transformer Power Power side of 24 Vac Transformer See diagram below RH or 4 red 24 Vac for heat 24 Vac power before heat switch see diagram below Rc Red 24 Vac for cool 24 Vac power before cool switch see diagram below Y Yellow switched power (cooling) Signal to turn on cooling system see diagram below W White Switched power (heating) Signal to turn on heating system see diagram below G Green Switched power for fan Signal to turn on fan (forced air) see diagram below
Heat Pumps/Multi-Stage Units
Terminal Colour Signal-type Description Y2 Can vary Switched power (2nd stage cooling) 2nd stage cooling signal to compressor W2 Can vary Switched power (2nd stage heating) 2nd stage heating/ sometimes used as emergency heat E Can vary Emergency heat enable Dedicated emergency heat 0 Orange Reversing value Reversing dynamics of the heat pump ----

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1 Answer

I am new to a heat pump. The thermostat has an 'auto' setting and an 'on' setting. I am confused as to which one to use for heat. Can you help me?


n most heat pump thermostats you have two control switches and the temp setting. One control switch will say "Heat", "Off", "Cool" while the other says "On" and "Auto". The three position switch is for whether you are heating or cooling. The two position switch is for the fan control. "On" will make the fan run constantly whenever the three position switch is in HEAT or COOL mode. Some people use this to circulate air at all times. MOST people use the AUTO mode, where the fan is controlled by the circuitry and runs during the times of heating and cooling only.

Oct 16, 2015 | Heating & Cooling

1 Answer

Will not switch off


make sure the one that says "cool, hot, and off" is switched to off.

Mar 02, 2014 | WHITE-RODGERS DIV 1F56N-444 Universal...

1 Answer

Furnace switches to auxiliary heat while in cool


It's likely a bad tstat. Turn the power off to your air handler. Remove red , green, yellow and orange wires inside the tstat and wire nut them together. Not sure if your reversing valve energizes in heating or cooling but, turn the power back on. If the unit is heating turn the power off and remove just the orange wire and turn power back on. Let this run and see if it you are ONLY getting cool air ALL the time. If so you have a bad stat. If still getting heat possibly you have a bad control board in the air handler. Good Luck!!

Apr 15, 2017 | Honeywell Heating & Cooling

1 Answer

My LS-H186 VML 1Metal Art Cool 12000 BTU Air Con does not heat up


You should also check the outside unit to make sure the coil is not clogged with dirt or grass clippings and the fan is working. The reversing valve that switches it from cool to heat could also be a problem. If it isn't shifting it will not switch between heat and cool.

Apr 29, 2010 | LG Art Cool LA181CNW Split System Air...

3 Answers

Frigidair HVAC not cooling; Believe its a emergency heat problem


the switch is on your thermostat - look for something that says "system" or "Em heat, heat, off, cool" switch it to "cool" and enjoy. If that doesn't work, call a HVAC service tech. You could have bigger problems than just the system switch. Good luck

Sep 05, 2009 | Frigidaire FAS185N2 Air Conditioner

1 Answer

Need to know what the settings are for the range adjustment A,B,C,D slide switch on the front panel on a Amana PTH123A35AC PTAC


Here they are;

Position A, Cool 70-78, Heat 65-73
Position B, Cool 68-81, Heat 68-76
Position C, Cool 66-83, Heat 61-78
Position D, Cool 63-88, Heat 58-83

Amana calls this a Temerature Limiter and says to only set one switch on at a time. If all switches are off then the unit is at full operating range.
Please rate this answer to let me know if it was the fix.

Jan 25, 2009 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

Heat pump


What type of furnace? strip heat....gas... I would check the reversing valve.Run the unit in cooling have someone switch the stat to call for heat....."Whooosh!!!" the reversing valve will switch over.Other methods of switching the valve , remove one wire, remove the nut and slide the solenoid off the valve will reverse. The switching solenoid can be checked magnetically by using a small screwdriver. Switch from cool to heat or heat to cool this way you can check if the valve is getting a signal .
Heat pumps are a fairly complicated simple device..... sometimes just switching the valve back and forth a couple times gets it unstuck. Remember air coming from the duct will feel cooler than air from a gas furnace .
Most customers don't think they are working when they really are. 100 degree heat is not that hot to 98.6 degree person who is used to 120 degree gas heat!

Jan 10, 2009 | Heating & Cooling

1 Answer

Mitsubish mr Slim air contioner heat & cooling control panel


HOW TO WORK THE HEATING AND COOLING CONTROL PANEL
- PRESS THE SWITCH ONCE IT OPERATES "COOL"
- PRESS THE SWITCH AGAIN IT OPERATES "HEAT"
- PRESS THE SWITCH ONCE AGAIN IT STOPS.
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Mar 05, 2008 | Mitsubishi Mr. Slim MXZ30TN Air...

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