how to check amp draw on a blower motor

marlysbaddeley5203 April 04, 2022 check , draw , how , to Comment

4 Divide 125 by the resistance value you got in step 3. Set it to the correct ampere range for.

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

Open up the blower compartment of the furnace or air handler.

. Youll be testing across the blower motors connector and not the vehicles wiring harness connector. The reduced voltage causes the blower motor to draw proportionally. 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.

Dont just replace the motor and run check things over thoroughly. Have the blower motor wirewired so that continuous fan operates on low speed. Each gets half the voltage but because their resistance hasnt changed the halved voltage can only drive half the usual amperage as well.

Go to the disconnect or gain access to motor supply wires at a breaker in a distribution panel. 06-24-2013 0709 AM 7 jmsmars1 Professional Member Join Date Feb 2013 Location Lamar SC. Saturn s-seriesDisclaimerThis video is not meant to be a definitive how toAlways consult a professional repair manual before starting your repairI am not.

The amperage draw of your Dakota or Durangos blower motor should be under 40 amps. Read your amps from there. The amperes are on the label on the AC motor.

Step 1 Read the amperage draw your AC motor requires if its operating according to the manufacturers specification. Most of us carry one of many electrical multimeters that are on the market to test electrical. I dont know what the amperage should be.

Engine running AC on fan on high setting 4 and the meter measured 198 amps. 2 Place your multimeter in Ohms mode. 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.

Each bulb ends up drawing 25 watts and the entire circuit draws 50. The blower motor gets power and Ground from the 2 wires that connect to it. You may need a muiltmeter to test the current draw on the blower motor circuit.

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. 3 Measure the resistance of the blower motor with your multimeter. Blower motor stops after about 20 minutes but doesnt give an alarm code with no change in thermostat settings.

The draw should be less then half of the rated fuse. To find out the amperage draw well test the blower motors resistance. This is the terminal slot that feeds the blower motor relay with battery power from the 40 amp fuse fuse 12 located in the under-hood fuse box.

This brown wire is used to ground this Jettas blower motor. Using a multimeter to measure current requires that you break the circuit and put the meter in series with the blower motor. Open up the blower compartment of the furnace or air handler.

If it does work on low or high with out blowing the fuse i would. Motor was changed from 34 hp to 12 hp two tears ago. This will reduce energy consumption but dont expect more than a 50.

This amperage measurement is taken with the. Your airflow will be unaffected. Then well divide the resistance value by 125 to calculate its amperage draw Ohms Law.

Connect the amp clamp from your electrical meter around the power wire. Step 2 Set your multimeter to measure amperes. Applying Power And Ground To The Blower Motor.

The furnace has had the blower motor replaced in it twice. Tension the belt properly if there is one WHEN TO UPSELL When a blower motor does fail Beaulieu said it is often a good time to tell the homeowner to consider upgrading the equipment. Depending on the furnace electrical components cant get specific here may need to be added.

If your volt meter has a DC amp option you can check it with thatalthough many meters will not go above 10 amps. I know that this is barely over FLA but I normally see these 12 hp motors drawing 4-5 amps at maximum. Youre getting your reading while maintaining the exact conditions under which the motor operates.

Amps Volts Ohms. 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. Disconnect the blower motor from its electrical connector.

How do you find out the amp rating of a furnace blower. If you have an amp clamp you can just clamp it around the blower power wire for a measurement. 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.

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. 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. The connector on your Fords blower motor will have a BRNORG wire and a PNKWHT wire.

Find the Full Load Amp FLA rating of the blower motor. Stop running the blower continuously or. Before we discuss taking measurements lets look at safety.

Check the rotation of the fan. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. Battery power should be present all the time in other words with both the key off or the key on.

Amps run at 5 to 6 amps. The resistor lowers the voltage consuming a small amount of power. 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.

With your multimeter in Volts DC mode confirm that this slot has battery voltage. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. Disconnect power from the blower motor by shutting it off at the disconnect box to the unit or unplugging the power source.

Measure the current draw when complete to make sure its within proper parameters. Locate the power wire leading to the blower motor.

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