how to check amp draw on a blower motor

bonawitz April 25, 2022 blower , how , motor , wallpaper Comment

Engine running AC on fan on high setting 4 and the meter measured 198 amps. The draw should be less then half of the rated fuse 20 amp fues draw is less then 10 amps You did not say but does the blower work on high only or the lower speeds with out blowing the fuse.

Check Motor Amps Air Conditioning Repairs Near Apex North Carolina Youtube

Problem is it runs very hot frequently tripping its internal heat overload when run for an extended period 4 to.

. He said that it is pulling too many amps. Theoretically if you hooked your blower motor up to 120v your current draw would be less by a ratio of 101 12v x 30a 360 watts. I know that this is barely over FLA but I normally see these 12 hp motors drawing 4-5 amps at maximum.

Check all related circuit wiring and replace blower motor if higher than normal amperage draw is detected I have a multimeter but am confused to where and how to use it for amp draw. A weak or damaged blower motor will not be able to deliver enough airflow to maintain a decent temperature. If it does work on low or high with out blowing the fuse i would replace the blower resistor.

4 Divide 125 by the resistance value you got in step 3. The Amps will be labeled on the motors name tag. Amps Volts Ohms.

Turn off the motor. The service tech that comes out twice a year says that I need to replace my furnace motor. How do you test a blower motor with a multimeter.

If the ampere reading is within the range you set on your multimeter the AC motor is drawing the correct amperage. This brown wire is used to ground this Jettas blower motor. Your blower motor may be broken if the airflow in your vents is poor or non-existent.

Amp draw should be approx 13-17 amp when blower is operating on high mode. Lets get started. 2 Place your multimeter in Ohms mode.

You may need a muiltmeter to test the current draw on the blower motor circuit. It seems to me to be working just fine. This will reduce energy consumption but dont expect more than a 50.

I have a 4 speed 12 hp motor. The Max Amps on the furnace plate says 85. DCAC is not different per say so the voltage to current ratio stays the same your blower is fused at 30 amps so that means it could be drawing 26-30 amps i would sayfor the question im sticking with 30a.

Then well divide the resistance value by 125 to calculate its amperage draw Ohms Law. Maximum current draw blower motor Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here Maximum current draw blower motor This topic contains 2 replies has 2 voices and was last updated by Jimmy 5 years 4 months ago. This amperage measurement is taken with the.

1 Disconnect the blower motor from its electrical connector. Read the multimeter display and then immediately remove the sensors from the AC motor. 4 Divide 125 by the resistance value you got in step 3.

Under the glove compartment door there is a soft panel that can be moved out of the way exposing a brown wire which is the ground for the blower. The motor is a 5-speed EMERSON K55HXNHD-4656 115V 10 amp. I personally have two different clamp on amp meters and both read 20amps peak at start-up and 78 amps constant.

Stop running the blower continuously or. Saturn s-seriesDisclaimerThis video is not meant to be a definitive how toAlways consult a professional repair manual before starting your repairI am not. If it will go high enough you can insert the meter on the positive side from the battery to the controller with the positive lead from the meter to the positive lead from the battery and the negative meter lead to the positive wire to the controller.

HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. 3 Measure the resistance of the blower motor with your multimeter. Then well divide the resistance value by 125 to calculate its amperage draw Ohms Law.

If your volt meter has a DC amp option you can check it with thatalthough many meters will not go above 10 amps. Most of us carry one of many electrical multimeters that are on the market to test electrical. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments.

Blower motor breakdown can be the result of anything from old age to failed bearings high amp draw electrical failure in the windings dirt accumulation and more. If its below the range get your motor checked as it may require maintenance such as new brushes. Check the rotation of the fan.

Depending on the furnace electrical components cant get specific here may need to be added. Before we discuss taking measurements lets look at safety. To check the purple wire for current use your ignition key and turn it to the run setting turn the heater power to full power and set the multimeter to DC power.

While checking the unit today I noticed the motor that was replaced two years ago was drawing 77 with a FLA of 75 The service factor on the motor is 10. Youll be testing across the blower motors connector. Knowing how to troubleshoot and diagnose problems with these motors is an essential skill an HVAC technician must possess.

Using a multimeter set on the Ohm scale use the positive lead and test the black wire. The blower motor amperage draw is minimal. I have the motor wired using the slowest speed.

Testing Blower Motor Amperage and VoltageDisclaimerThis video is not meant to be a definitive how toAlways consult a professional repair manual before star. To find out the amperage draw well test the blower motors resistance. Have the blower motor wirewired so that continuous fan operates on low speed.

The furnace has had the blower motor replaced in it twice. The amperage draw of your Dakota or Durangos blower motor should be under 40 amps. Hvac R Amp Draw For Blower Motor Pt 1 Youtube I dont know what the amperage should be.

If your meter reads no.

How To Measure Blower Motor Amp Draw Contracting Business