how to check amp draw on a blower motor

kerryfleshner15894 April 07, 2022 amp , check , draw , how Comment

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. Most of us carry one of many electrical multimeters that are on the market to test electrical.

How To Check The Amperage Draw On An Ac Motor It Still Runs

Read the amp draw of the blower motor.

. If your volt meter has a DC amp option you can check it with thatalthough many meters will not go above 10 amps. Check the amp draw against the manufacturers fan performance data to verify the airflow that the fan is producing. 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.

This brown wire is used to ground this Jettas blower motor. The blower motor gets power and Ground from the 2 wires that connect to it. Keeping the black lead on a good ground usually a bolt on the engine block and the blower switch turned on use the red lead to probe the plug that usually attaches to the blower motor.

I have tried a few different ways but none seem very easy or accurate for that matter. What well do to check to see if the blower motor is fried is to unplug the blower motor from its connector and manually apply battery power and. Have the blower motor wirewired so that continuous fan operates on low speed.

3 Measure the resistance of the blower motor with your multimeter. Find the Full Load Amp FLA rating of the blower motor. Check the rotation of the fan.

You may need a muiltmeter to test the current draw on the blower motor circuit. Measure the current draw when complete to make sure its within proper parameters. Youll be testing across the blower motors connector.

Locate the power wire leading to the blower motor. If it does work on low or high with out blowing the fuse i would replace the blower resistor. If its below the range get your motor checked as it may require maintenance such as new brushes.

Applying Power And Ground To The Blower Motor. The connector on your Fords blower motor will have a BRNORG wire and a PNKWHT wire. Connect the amp clamp from your electrical meter around the power wire.

Just wondering how everyone else is handling this. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. If the motor is direct-drive these numbers can be difficult to read.

Saturn s-seriesDisclaimerThis video is not meant to be a definitive how toAlways consult a professional repair manual before starting your repairI am not. This will reduce energy consumption but dont expect more than a 50. How to check amp draw on a blower motor Eunkyung likens this style to jewellery.

2 Place your multimeter in Ohms mode. I dont will need a hoop when I have these nails she states. Measure the supply voltage to the blower as its running to be sure there is adequate power supplied.

The meter should read between 9 and 11 volts or the test light will light up. Turn off the motor. Check the rotation of the fan.

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. To find out the amperage draw well test the blower motors resistance. If the ampere reading is within the range you set on your multimeter the AC motor is drawing the correct amperage.

HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. 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. Open up the blower compartment of the furnace or air handler.

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. Before we discuss taking measurements lets look at safety. That includes the secondary heat exchanger the evaporator coil etc he said.

4 Divide 125 by the resistance value you got in step 3. As a part of our PMs we measure the amps that the blower motors are pulling. Lets get started.

Open up the blower compartment of the furnace or air handler. Then well divide the resistance value by 125 to calculate its amperage draw Ohms Law. Engine running AC on fan on high setting 4 and the meter measured 198 amps.

1 Disconnect the blower motor from its electrical connector. Open up the blower compartment of the furnace or air handler. Connect the amp clamp from your electrical meter around the power wire.

Amps Volts Ohms. Locate the power wire leading to the blower motor. Depending on the furnace electrical components cant get specific here may need to be added.

Dont just replace the motor and run check things over thoroughly. Recreate the look with a glitter polish in addition to a toothpick or little brush dabbing diligently to develop your outlines. 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.

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. The amperage draw of your Dakota or Durangos blower motor should be under 40 amps. What should the AMP draw be on a blower motor.

I know that this is barely over FLA but I normally see these 12 hp motors drawing 4-5 amps at maximum. Otherwise normal old-age issues such as bearing failure cause seizing which leads to massive electrical failure. Stop running the blower continuously or.

The furnace has had the blower motor replaced in it twice. When you pull the door off of a variable speed unit the motor ramps down and any measurement taken then is not true to conditions. This amperage measurement is taken with the.

Read the multimeter display and then immediately remove the sensors from the AC motor. 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.

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