Question about Goodman CLQ36AR49 Air Conditioner

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Tstat wiring when wiring the tstat the wires touched now i have no power on the low volt wires,and looked all over cant find a fuse

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Thanks for your Question,
one of two possiblities, first and most likely is that you have blown the Transformer in the Furnace, second would be that you have blown the small car fuse that is on the circuit board in the furnace, if you look really hard you will find it, it looks like an automotive fuse, should be about three amps, if it is the fuse, then its a simple fix, make sure the power is off, replace the fuse, if its the transformer, a little more involved work is needed, but still should be pretty straight forword, and again, please make sure the power is off when replacing, hope that helped ! please be sure to come back and let us know how I did for ya, thanks again,
mr.grzz

Posted on Jan 22, 2009

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for somebody to jump the fuse it tells me there is a low voltage wiring problem. likely have a bad tstat wire somewhere. blower not turning on in auto usually means you have a G wire hooked up to the tstat and the tstat is set for gas heat, needs to be set to electric heat when G wire in place. there's a good start, NEW TSTAT WIRE and proper settings

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On a good man air handler aruf61d14aa model we have trouble with low voltage wiring. Already blew one fuse so thinking I have wired it wrong.


Red is power green (or in a goodman might be grey) lands on g which is for your indoor blower white is for heat. Yellow from the tstat( which doesn't land in the air handler ) is for cooling and goes out to the condenser along with the blue which is common. First unhook all your tstat wires. Put red and green together to turn on blower. Turn power on and make sure it's good. Then add white for heat, turn power on and make sure you're good. This will ensure YOUR PROBLEM IS OUTSIDE the air handler. Then ONE WIRE AT A TIME add back your tstat wire, turning power off and on after each wire. First do red. Then do green then do white then do yellow. TURNING POWER OFF EACH TIME. IF AND WHEN THE FUSE BLOWS you will know what part actually blows the fuse. Let me know. It's possible your contactor outside is shorted and blowing the fuse. This will blow the fuse only when you hook the yellow from the tstat up to the wire going outside to condenser. Remember to unhook everything first. Let me know if you need more help.

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So you have no 24 volts. Either float switch is tripped, transformer or fuse bad, or your tstat is bad. Turn power off to indoor unit. Open tstat and wire red green and yellow together. Turn power back on. Let me know...

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You either have an open 3 or 5 amp fuse at the indoor unit, open transformer at the indoor unit, loose or broken wire connection from the indoor unit to the tstat, or a bad tstat. Could be a low voltage short that damaged the fuse/transformer. Or damage to the wires that caused a short.

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1 Answer

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Not sure if you ever figured it out. Or if someone figured it out for you. Shows no one answered you on here. So I thought I would ask you a question plus also say what I thought it was . When the unit and or the thermostat was replaced? Was the thermostat wire that is inbetween the unit and the blower ever replaced? A service tech should have checked if the tstat wires were touching or shorted together. If you go by color which you should never do. Red is usually 24 volts or power, green is fan, yellow is cooling, white is heat, orange is the reversing valve if its a heat pump, orange to O terminal if RV in cooling or orange to B terminal if RV in heat. O or B terminal depends on who the manufacturer of the unit is. Blue wire is usually the common. you should always check to see how it is wired at the board or relay in the unit. not everyone wires it by the colors. If your fans low voltage wires are touching the low voltage 24 volt power wires in the unit or if the wires are shorted or touching in the wire sleeve or at the thermostat. the blower motor will never shut off. Or if the blower motor is wired directly to line voltage it will never shut off and testing the low voltage wire wont matter.

Your question was from last summer. So I am assuming you had someone figure it out by now. If not then check my suggestions. Hope that helps you.

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Should have a 5 amp fuse on red wire in between transformer and tstat. If not put one. This will protect transformer. Turn power off and take a good picture of tstat wiring. Remove all wires to the tstat. With the air handler wires join fan and red. (Likely green) let run. Then add compressor and reversing valve ( if reversing valve is energized in cooling ) which in most cases it is. Should then have cold air. Let run. If no problems you know it's outside of the machine. Tstat or wiring. Hook inside of machine all back up to tstat wires. Do the same thing with the tstat wire inside the thermostat. If no problems, must be bad tstat. Hook everything back up right. If fuse blows or transformer because you didn't put the fuse, then you know for sure it's the stat. Good Luck

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1 Answer

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Check for wires rubbing together from the thermostat to the furnace. More than likely there is a short somewhere in the low voltage wiring. Check the wires on the thermostat also to make sure none are touching together.

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Blown Transformer heat pump


blown transformers are usually from a low voltage short the first thing i would do is wire a automotive or resetable 3amp fuse in line with the transformer so you dont blow transformer after transformer the wire coming off the transformer that say 24v take that wire a couple of inches down and cut it and install the fuse in series there
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now you can go through your low voltage wires one by one and test them unhook all the wires to your outdoor condenser at your indoor unit(furnace or airhandler) and try turning it to cool now if you blow the fuse the short is between the tstat and the indoor unit if the fuse is still good leave it on cool and hook up one wire at a time to your outdoor unit starting with R a lot of times your contactor or your defrost board will short out on you also look for pinches in wires wires with cracks in the insulation and wires touching metal this situation can be a real pain sometimes i would recommend calling a hvac company if you start to get stumped
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