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I have a honeywell pro 2000 programmable thermostat which controls an enerzone ahc 31-18 series water source air handler with heating and cooling coils built in. This therostat and heater worked fine all winter. Last week i had a air conditioner stalled and connected to the air handler and the AC worked for one day. When i tried to turn on the AC yesterday, the fan would not come on for either AC or heat. any troubleshooting suggestions? thanks ... Donald

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Honeywell Thermostat RTH 7500

Assumed all the wiring are correct,

to change from manual switching from heat to cool, press [system] button ( left ) to go into system setting.

then press and hold the [fan] middle button untill option display 120

use up down button to select option 300 ( Manual/Autochangeover) ,

select 0 for manual, 1 for automatic. ( read caution in page 22 of installation manual )

Good luck

Posted on Oct 14, 2008

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SOURCE: My Lennox Air conditioner only heats

It is possible that it's the thermostat. When you turn it into cool mode, does the unit come on at all or is it silent? If nothing is coming on, then it's likely it's the tstat. Did the tech check the refrigerant charge while he was there? He should have checked it with the auxillary heat off and the unit just in heat mode. Make sure that the condenser unit outside is coming on when you are calling for cool, If you turn it on and everything comes on, go outside and put your hand on the large copper pipe coming into the unit. In cool mode, this pipe will be cold to the touch and in heat mode, the pipe will be warm to the touch. There isn't much you can do on your own with the exception of changing the tstat. If you can answer some of the questions I have posed, I can try and give you some more answers. Just remember that a check up doesn't mean its a guarantee that something won't happen the next day, it's just that everything was in working order at the time of the checkup.

Posted on Mar 21, 2009

  • 52 Answers

SOURCE: Hunter thermastat, model 44860 not working

Is the compressor running? is the outside unit clean and free from debris? does this unit work in the heating mode during the winter, and is it still capable of that now.

Posted on Jun 02, 2009

  • 4 Answers

SOURCE: Honeywell T8112 Air Conditioner Will Not Cool, But Blower Works

make sure the system switch is in the cool position, then press run program button and allow a couple of minutes for system to cycle on, if it doesn't come on press the button for lowering the set point, set it to 72 degrees and then press the hold temperature key.

Posted on Jul 26, 2009

  • 9 Answers

SOURCE: I am trying to wire a Honeywell Vision pro Th8000

RC & RH JUMP WITH R FROM AH & CU
C/U - A/H - T
R - R - R = 24V
C - C - C = COMMON
Y - - - Y = COOLING
G - G = FAN
B O\B = REVERSING VALVE - HEAT
make sure the stat is set up for heat pump
Not sure what b or d are. i would double check the schematic on the condenser for the reversing valve wire.

Posted on Dec 16, 2009

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I am trying to wire a Honeywell Vision pro Th8000 series thermostat onto a Weather king heat pump and air handler. The thermostat wiring has r,rc,y,c,o/b, g aux,e,y2andl terminals I understand these but...


RC & RH JUMP WITH R FROM AH & CU
C/U - A/H - T
R - R - R = 24V
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Dec 16, 2009 | Heating & Cooling

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