Question about Gibson Gas Furnace 60000 Btu 90% Afue Model Kg6rc060c12a Upflow Or

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Just replaced OEM transformer in my Gibson gas furnace, KG6RA 060C 12A. The hum is very loud and continuous. Is that normal?

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The hum is probably coming from a relay. there is nothing in a transformer to hum.

Posted on Aug 13, 2015

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Posted on Jan 02, 2017

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Have Gibson furnace runs cycle but seems don't get hot enough out of vents check all 115 degrees at vents use to lot hotter old furnace you couldn't stand on vents now you can easily


Is this a gas furnace ? Newer high eff. gas furnaces do have cooler outlet temperatures. The installer should have checked the temperature rise and gas pressure. By adjusting the gas pressure and blower speed you can obtain a higher outlet temp, but you don't want the gas pressure to be higher than the manufacture specs and you don't want the furnace to run outside of the manufactures temp rise specs.

Mar 02, 2017 | Gibson Heating & Cooling

2 Answers

My furnace works but their is a humming coming from the transformer when it shuts off


Call an electricist. You might have some serious problem in the transformer. That ·humming" sound might be the transformer burning out!

Oct 05, 2015 | Heating & Cooling

1 Answer

Constant humming


There are voltage lowering transformers in the furnace, this is normal unless it is pronounced.

Jun 28, 2014 | Heating & Cooling

1 Answer

Gibson Furnace KG6RC-060C-12A Model


Somewhere on the unit there is a small chart that identifies the problem that the lights are indicating. That helps narrow down a long list of possibilities. However, if you catch it acting up you can check that limit switch like this:
with your voltmeter set to voltage test from one side of the switch to the other. If the limit is "open" due to an overheat problem your meter will read 240 or 24 volts depending. If the limit is closed/working it will read 0 volts. The unit must be running for this test. The problem is there is a small window of opportunity before it cools off and closes. Whatever you do, DO MOT BYPASS THE LIMIT!

Feb 13, 2014 | Gibson Gas Furnace 60000 Btu 90% Afue...

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Why two 24 Vac on aprilaire 700's control unit?


Okay, I looked up the installation manual online to see exactly what you are working with.
Yes the R anc C need to be hooked to the transformer supplied with the unit. The primary 120v side needs to be hooked into the power coming into the furnace. this can easily be done were the L and N get hooked into your furnace or circuit board on the furnace. This will provide the contiuous power to the unit. Preferably you will hook this after the door switch of the furnace so that you will kill the power toit if you take the blower door off.
The ODT terminals are for the outdoor sensor if you want to hook that up it will vary the humidiy in your home according to the outdoor temperature then.
Now the W/G and Cf terminals. If you have 24v coming from the HUM terminals of your furnace you DO NOT need a second transformer. You must check your furnace manual or check the voltage to them with the furnace blower energized. The HUM terminals will only have power to them when the blower should be running.
If the HUM terminals are 120v then you need to get another transformer and hook up the primary side to the HUM terminals so it is powered only when the the blower is running. Hook the secondary side to the W/G and Cf terminals.
So bottom line is that you need to figure out what voltage your furnace is giving to the HUM terminals and then go from there. Some times the EAC terminals or the ACC terminals will be 24v on the furnace board. Either of them could be used also, as they are only energized when the blower is running also.

Heatman101

Jan 25, 2010 | Aprilaire 700 Humidifier

2 Answers

Loud humming noise


when was last time furnace was serviced --air filter change burner area cleaned vacuumed the hum can be a few reasons ---fan bearing need service [ oiled ] fan bracket bushings damaged or loose --burner out of adjustment burning improper etc these are a few

Jun 03, 2017 | Heating & Cooling

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Sears 92 gas furnace noise when not in air handling mode


a very subtle hum or buzz is normal and is the transformer that creates 24 volt control voltage continually. some are noisier than others . sometimes a tap or bending of the transformer will tweak the metal enough to make it quieter. they can also get loud if incoming voltage is not correct. incoming 120 volts on a furnace is not usually a problem but the transformers are usually wired to the available incoming 230 voltage or 208 voltage if it is a heat pump or electric heat. If it is powered by 230 or 208 volts as most heat pumps are ,then you need to verify which you have and connect the appropriate leads from the trans former to power . it tells you on the side of the transformer which to connect to 230 and which to connect to 208. tape or cap off any unused leads.since you have not mentioned any performance problems i assume the fan does come on when called for and that it is not the loud hum you hear. switching the fan switch at stat to on should bring the fan on right away. if it doesn't then you may hear a loud hum and then youll need to check the fan motor and capacitor. but it sounds like a noisey transformer from here.

Oct 28, 2008 | Heating & Cooling

1 Answer

Loud humming


Ouch. Magnetron check performed with multi meter.


1) Disconnect power to unit
2)Allow to stand for minimum 5minutes
3)Remove cover
4)Find large insulted screwdriver
5)short terminals of capacitor to dissapate charge. (If no pop or crackle its possbly already bled through resistor.

Right. Magnetron check both terminals for short to casing if shorted, replace. Check reading between terminals low resistance or direct short is not a problem. Open circuit, replace.

For non heating, this is usually barrel fuse, typically HV 5Kv or more, faults in an overcurrent situation.

Check the capacitor for shorts to casing, a short will indicate a failure. Check the diode in the capactior if fitted by reverese continuity check accross the terminals. MUST DISCHARGE FIRST, else you'll blow the meter up and likely recieve a SEVERE burn.

The most common cause would have to be a problem with the capacitor next the transformer for loud humming. Three basic checks for the transformer.

Probe the low voltage side first, open circuit? replace. a low reading is normal, high voltage side is a two part process, take a reading between the two terminals one goes to the magnetron the second to the capacitor directly. this should be approx the same reading as the LV coil. The last and most important coil is to check the coil side ofthe barrel fuse to ground, this will measure between 80 - 150 on a digital meter, around 90 to 100 for a 900w is in the normal range.

Loud humming is created primarily by having a working transformer with no wher to send the voltage out.

It will only be one or more of these three items, which will cause this, the rest is safety and control gear.


Jun 14, 2008 | GE JVM1630 Microwave Oven

1 Answer

Noisy transformer


Normally, power transformers don't hum loudly unless there is a problem in power supply circuit. If all seems normally operational, the problem may be simply anchor screws that hold transformer to frame may be loose. Try tightening them

Apr 29, 2008 | Parasound HCA-855A 5-Channel Amplifier

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