how to check amp draw on a blower motor
Then well divide the resistance value by 125 to calculate its amperage draw Ohms Law. Saturn s-seriesDisclaimerThis video is not meant to be a definitive how toAlways consult a professional repair manual before starting your repairI am not.
Checking Blower Motor Amperage Draw Youtube
Id guess between 15 and 20 amps.
. This brown wire is used to ground this Jettas blower motor. 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. Amps run at 5 to 6 amps.
Depending on the furnace electrical components cant get specific here may need to be added. 4 Divide 125 by the resistance value you got in step 3. 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. 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. The amperage draw of your Dakota or Durangos blower motor should be under 40 amps.
Reconnect the blower motor to its electrical connector if its unplugged from previous testing. Bypass the blower motor resistor power transistor by jumpering together terminals 2 and 4 of the blower. Connect the amp clamp from your electrical meter around the power wire.
As a part of our PMs we measure the amps that the blower motors are pulling. To find out the amperage draw well test the blower motors resistance. I know that this is barely over FLA but I normally see these 12 hp motors drawing 4-5 amps at maximum.
Measure the current draw when complete to make sure its within proper parameters. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments. Set it to the correct ampere range for the AC motor youre checking.
That includes the secondary heat exchanger the evaporator coil etc he said. Open up the blower compartment of the furnace or air handler. Dont just replace the motor and run check things over thoroughly.
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. 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. Lets get started.
Applying Power And Ground To The Blower Motor. 1 Disconnect the blower motor from its electrical connector. 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.
3 Measure the resistance of the blower motor with your multimeter. However for safety reasons its recommended that you dont keep the heater running all that time. The connector on your Fords blower motor will have a BRNORG wire and a PNKWHT wire.
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. Using a multimeter to measure current requires that you break the circuit and put the meter in series with the blower motor. Each gets half the voltage but because their resistance hasnt changed the halved voltage can only drive half the usual amperage as well.
Now we know that the blower fan on the furnace draws up anywhere between 10 to 12 amps per hour. I have tried a few different ways but none seem very easy or accurate for that matter. The reduced voltage causes the blower motor to draw proportionally.
Each bulb ends up drawing 25 watts and the entire circuit draws 50. How to Check the Amperage Draw on an AC Motor Step 1. Find the Full Load Amp FLA rating of the blower motor.
You may need a muiltmeter to test the current draw on the blower motor circuit. This amperage measurement is taken with the. Measure the supply voltage to the blower as its running to be sure there is adequate power supplied.
Motor was changed from 34 hp to 12 hp two tears ago. Engine running AC on fan on high setting 4 and the meter measured 198 amps. 2 Place your multimeter in Ohms mode.
If it does work on low or high with out blowing the fuse i would replace the blower resistor. It is fed from a 40A fuse through the blower motor relay but it wont be anywhere near 40A. Locate the power wire leading to the blower motor.
Youll be testing across the blower motors connector. Just wondering how everyone else is handling this. How many amps does a propane furnace draw.
If the motor is direct-drive these numbers can be difficult to read. What should the AMP draw be on a blower motor. Read the amperage draw your AC motor requires if its operating according to the manufacturers specification.
The furnace has had the blower motor replaced in it twice. This means that the heater can run non-stop for a little over 12 hours. Stop running the blower continuously or.
Check the amp draw against the manufacturers fan performance data to verify the airflow that the fan is producing. Open up the blower compartment of the furnace or air handler. Blower motor stops after about 20 minutes but doesnt give an alarm code with no change in thermostat settings.
Set your multimeter to measure amperes. Here are the test steps. This will reduce energy consumption but dont expect more than a 50.
Amps Volts Ohms. 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.
Before we discuss taking measurements lets look at safety. Have the blower motor wirewired so that continuous fan operates on low speed. HOW TO MEASURE BLOWER MOTOR AMP DRAW Test Instruments.
The resistor lowers the voltage consuming a small amount of power. The blower motor gets power and Ground from the 2 wires that connect to it. 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.