Question about Goodman CLQ36AR49 Air Conditioner

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No voltage from 24 volt transformer power in no power out .

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  • Goodman Master
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Hi,
The transformer is burnt out... you will need to replace it... this is common and they burn out easily if a low voltage wire it shorted even for a split second, or if there is a brown out...

They best way to prevent this is by installing a 5 amp fuse ahead of the transformer in the high voltage line so that it blows before the transformer goes...

heatman101

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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My thermostat doesn't get 24 voltage and I check all power is on can you please help me to figure out thank you


How do you know it does not have 24? Are you using a meter and do you have a common? Sounds like your float switch for your drain is tripped, meaning the drain is clogged or a burnt fuse on the red wire. Check the drain for a piece with 2 wires. Remove this piece and check for 24. If water inside float you will need to vacuum line free of clog. NEVER LEAVE SWITCH OUT. This will end up overflowing and causing water damage to home. If not the case turn off power and remove cabinet door. Locate 5 amp fuse and inspect. If you are using a meter you can verify the transformer is producing 24 volts. Power would need to be on for that. 240 volts can kill you, use extreme caution. Good Luck!

Apr 09, 2017 | Heating & Cooling

1 Answer

Air conditioning thermostat not functioning


ab302475-b998-41c7-9c7c-4e106b68e0be.pngGo to your thermostat and look at the FAN switch, it will be in the AUTO position typically.
Set the FAN switch to the ON setting,
by doing this if the fan motor operates you know that the High voltage & the low voltage (24 volt control power) are present.
This saves you from having to go to the breaker panel and checking / resetting the breaker as well as checking the Transformer and automotive type 3 amp control circuit fuse (generally on the circuit board).

If you do not get any fan operation by switching the fan switch to the ON setting, you then will have to determine if the breaker, transformer and aforementioned 3 amp fuse are all good.

You will need a volt meter to test further.
At the thermostat remove the cover thus exposing the thermostats sub base and assorted circuits/wiring.

RED or R
Red is the 24 volt "hot leg" of 24 volt power which originates at the transformer. Red enters the thermostat on the Red or R terminal, some thermostats will have an RC and an RH terminal, these are jumpered together on single transformer systems as they are for Red Cool and Red Heat, without a jumper wire on RC and RH, the Red "hot leg" of the 24 volt control voltage will only energize the terminal its wired to, some stats are battery powered and do not use the transformers 24 volt power (parasitically) to power the thermostat.
If the thermostat is powered by the transformers 24 volt power, there will be a "COMMON" wire on the common terminal of the thermostat, this is the other side of the 24 volt power from the transformer, the side opposite from RED the 24 volt "hot leg"
Common is called common as its the side of power that EVERY
24 volt circuit terminates, or completes its circuit, thus the COMMON designation.
During a Heat call the 24 volt hot leg is sent out via the white/heat terminal to the gas valve etc.
So between terminals Common & White , it should read 24 volts during a call for heat.
Same for Fan which is the Green or G terminal,
Same for Cool which is the Yellow or Y terminal.
If you have no power to these terminals when calling for heat or cool or fan then yes the thermostat is defective and requires replacement.
DO NOT let the RED wire touch ground or the COMMON terminal, this is a direct short and blows the fuse or transformer
if not equipped with fuse protection.

Normally you should read 24 volts between RED and COMMON

Aug 01, 2013 | Goodman CKL36AR36 Air Conditioner

1 Answer

No output from Orbit transformer Model # WT41-2600300AU, transformer rated output is 26volts, 300ma. Only transformer I have been able to find is Orbit # 57040-10C, 24vac, 750 ma. Is this supposed to be...


The 750 ma transformer is fine. The only concern you have is that it matches voltage. The higher amperage is what it is capable of delivering. It would be like plugging a radio into a circuit with a 15 amp breaker or a 20 amp breaker. My transformers are 1250 ma, 24 volts. The 24 volt transformer will probably give you the 26 volts of your old unit. It is fine to use.

Gary

Sep 15, 2011 | Orbit Sprinkler System Power Source...

1 Answer

No humidity in the house


Hello, the first to confirm is if you are receiving 24 volts at the transformer, if you are then check for 24 volts going into the humidistat and out of the humidistat, if voltage is confirmed there then check if your solenoid is recieving 24 volts, if it is and the solenoid is not letting water into the humidifier than your solenoid is bad and must be replaced. If you do not have 24 volts at the transformer then turn off power to the transformer and set your meter to read continuity, you should have resistance if not the transformer is bad and must be replaced. If you have power to the humidifier and not humidifieing properly then you have to set the humidistat according to what the outdoor temp is, the outside temp determines what setting and % of humidity you should have in your home. Here is a what it should be
-20 set to 15%
-10 set to 20%
0 set to 25%
10 set to 30%
20 set to 35%
above 30 set to 40%

Jan 25, 2011 | Honeywell HE365 Humidifier

1 Answer

I replaced my thermostat last night without


check for 24 volts ac at R & C terminals at the t-stat. Your transformer will have 4 wires hooked up to it. Two on one side and two on the other. Two of them will read either 120v or 240 v ac depending on whether you have a 120 or 240 v voltage. The other side should read 24 volts. If you are not reading 24 volts, then you have burnt the transformer and will need to replace it. If you are reading 24 volts, check to see if there a low voltage fuse located on the control circuit board or somewhere between the transformer and "R" terminal.
Here's a picture of a typical low voltage transformer found in an A/C system:


If you replace the transformer, add a 5 amp fuse on one of the 24 volt leads......this will save you from having to replace another transformer in the event of future "short" in the low voltage circuit.
Contact me with any questions or concerns.

I hope you find this to be very helpful to you moving forward,

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May 09, 2010 | Heating & Cooling

1 Answer

How to connect a thermostat to heat source. bought thermostat to work in a homemade incubator. i can power in unit but when i connect heat source(light bulb) it wont switch it on when temperature is below...


get yourself a RIB (relay in a box) relay that is rated at 24/120. Also purchase a 24 volt door bell transformer. Wire 2 24 volt thermostat from one side of the transformer to the low voltage side of the relay then to the 24 volt thermostat than back to the other low voltage wire of the transformer. On the high voltage side, from your light bulb cut the wire going to the center lug of the light. Run one side of the wire to one side of the high voltage side of the relay, then run a wire from the other side of the relay (again high voltage side) to the the other side of the wire you cut on the light.

Mar 08, 2010 | Heating & Cooling

1 Answer

Have a Ruud AC unit the problem I have after installing a new condenser fan motor when I throw the circuit breaker the unit will not turn on but when I push the contacts on the contactor in manualy the fan...


The contactor engages from low voltage power from the thermostat as does the outside condensing unit. You may have blown the low voltage transformer or have a loose thermostat wire. Check line voltage(220 volts) to the transformer. Check load voltage(24 volts) from the transformer. If no voltage out,replace the transformer. If you have voltage out(24) check the thermostat wires and the thermostat. If you have a digital thermostat there is a 5 minute delay in the thermostat after power is restored before it activates.

Oct 08, 2009 | Ruud Central System Air Conditioner

1 Answer

My ac unit does not have power to the thermostat. There is 200 volts going into the transformer and 24 volts going out. There is 24 volts on the back side of a terminal with thermostat wire running to the...


Please exercise due caution in checking voltages in live circuits!

24 volts sourced by the transformer, through the thermostat, then through the contactor (turns on power to compressor/fan) and returns to the transformer, If the thermostat is closed (calling for cool) you will see no voltage across it, but instead the contactor should be energized. Please note, 200 volts seems odd, you should have between 215 and 235. It sounds more like the contactor relay coil may be open. Is the contactor/transformer one piece?

May 15, 2009 | Heating & Cooling

1 Answer

Fried transformer in air handler above board no #'s or voltage specs


What you need is a 24 volt transformer that has a rating of at least 40VA. 120 volts is the primary and 24 volts is the secondary voltage. You should try to figure out why the transformer burnt out first.

Paolo

May 05, 2009 | Heating & Cooling

1 Answer

Wiring transformer on ac


pls on the transformer is writing each wire color to the corresponding voltage you have 2wires low voltage 24 volts(secondary) and other 2 wires power ( primary) also if you follow the uni wiring you will find 3 vwires main power voltage may be 110 or 220 or 380 and two others low voltage commonly 24 volts after identification you can connect each wire to the other .

May 04, 2009 | Heating & Cooling

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