furnace blower motor drawing high amps

Using an Ammeter e. None of the above. c. The furnace fan switch. b. The only way for a roots blower to draw more current from its drive motor is for the blower discs rubbing, constriction of either discharge or suction ports or a failed pressure relief valve. If not, the blower motor itself will have a label on it. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. 1. In order to keep the Wattage output the same at 120V, it draws twice as much current. What does a high amperage indicate with a furnace blower motor? a. Looking for FASCO Induced Draft Furnace Blower, Replacement, 115 Voltage, 1.3 Amps, 1/25 hp HP (41H436)? On a GM or Chrysler, we would be alarmed that we would have this resistor fail again at this current. it will tell you everything you need to know about the system. I'll try to find out what the amp draw was according to the repairman. Evidently the blower motor is dead. blower motor electricity, this includes secondary sources of electricity usage. 115 volt draft inducer motor, rated for 1.8 amps is pulling 3.5 to 6 and spinning too fast and making all kinds of noise. Use caution when evaluating actual motor current versus rated current. Amps run at 5 to 6 amps. Will a RV furnace run on battery? try looking at the plate on the blower motor, it should tell you how many amps it pulls ... furnace. Right now, I've very limited information. This motor is on a circulating water system in a power plant. He said this could potentially lead to big problems, including destroying the board. Told customer of our concerns, and he requested a used blower motor installed. This causes the motor RPM to increase and the motor amp draw to decrease. This may list the electrical specifications of the blower motor. Had a service done on my furnace for the first time, have been in the house 1 year so time for the annual. Price $194.25. Checked current on 60k replacement, and it is still 18 amps. There are 3 motors and pumps that should run in parallel. Wire size is … Inducer motor amps I just had my furnace tuned up and the tech said the inducer motor was drawing 2.02 amps and the motor is rated for 1.8. Open b. The outside ac is only a 4 year old Trane, but the indoor furnace unit is a 2002 Coleman. A blower motor is drawing 8 amps. The motor is an Emerson M55HXHKP-9722, 115V 14 Amp. Make sure of two things. Dometic™ Atwood 30320 Hydro Flame Furnace Circuit Breaker - 5 AMP This circuit breaker is a re-settable heat sensitive device designed to protect the blower motor. Because this motor draws too high of amps we can only run 2 motors/pumps at a time. Similarly, you may ask, how many watts does a oil furnace use? 0 0. Another useful formula to use before making a motor pulley adjustment is the new amps formula. This is not the case. One 60 amp would feed two elements at 10 KW each and a fan. at least try to find a Model and serial number off the unit. This can not only be annoying, it can reduce the lifespan of your cooling equipment. Or, more specifically, researching the differences between fixed speed, multi-speed, and variable speed motors in your furnace or HVAC system. If you are at this point, then perhaps it is time to think about upgrading your furnace. A replacement blower motor is a substantial investment and plays an important role in creating a comfortable and healthy environment in your home. But he informed me that the blower motor was drawing 3 amps even though he said it's only rated for 1.8. Furnace Blower Energy Use • National Energy Consumption –0.6 Quads - 15 hours of world energy use - 10 days of U.S. oil imports –25% market share for good fans would save $2 billion + 1.2 million tons carbon each year • Barrier to mechanical ventilation (electricity cost ~ $500/yr) • … Yes, the furnace will run on batteries. We have pulled the pump and trimmed the impeller to reduce pumping capacity to lower the amp draw but it did not change the amp draw at all. Using amp meter, got the following readings: High - 18-20 Amps, Med-High - 14 Amps, Med-Low 10 Amps. Heat is actually produced from propane, but the blower fan runs on battery. Junior Member : Oct 23, 2006, 03:59 PM Either the motor is on it's way out or there is a possible restriction in the air intake. It may have a short circuit, or the motor may be bad. sometimes the plate can be in places you would not think of. Thanks for your inputs thus far. The most convincing way to teach this concept is to have students figure it out for themselves using a centrifugal blower. It reveals the elements of the circuit as streamlined shapes, and also the power and signal connections between the devices. It has been replaced twice, worked normally for a few days to a few months each time and then back to spinning too freely, pulling too many amps. As such, you should make sure you get a good blower motor from a reliable air-conditioning contractor that offers high-quality products and installation services. 1 day ago, furnace starts (burners turn on), but blower fan does not start at all; blowers subsequently turn off about 30 seconds later. Motor was changed from 3/4 hp to 1/2 hp two tears ago. Using a new example of a blower motor look at how simple this is and how useful it will be on the job. A natural gas furnace usually only requires a 15amp circuit, forced air electric furnaces can draw big time power. How many amps will the motor draw if the Sometimes, an air conditioner will draw too many amps and cause the circuit it is connected to to trip continually. For example, if the nameplate rated current is 100 amps, the actual current could be as low as 90 amps (-10%) or as high as 110 amps (+10%) and still be acceptable. A Basic Furnace Overview. Often on designing projects with blowers, the required H.P. It … Merry Christmas everyone! Or, a 30 amp and 60 amp would feed three elements adding up to 15 KW furnace and a fan motor. Grainger's got your back. This is because motors are rated in Watts or Horsepower and according to Watts law Watts = Volts x Amps. No one available til Tuesday. I replaced the blower motor about 4 … It'll take more than an 800 watt generator to run the normal oil fired furnace because the burner and the blower will be running at the same time. 2 days ago, furnace air intake ducts start emitting a "burning odor" when the unit is running. Closed 21. Any condition that will attempt to control the air flow will result into the equipment drive drawing more amps. It should list the voltage, amperage, horsepower, etc. Have you ever noticed a blower motor rated for 120V draws about twice the amperage of the same horsepower motor rated at 240V? An assumption people often make is that since low voltage increases the amperage draw on motors, then high voltage must reduce the amperage draw and heating of the motor. A wiring diagram is a streamlined standard pictorial depiction of an electrical circuit. but only draws 10 amps running by measurement. Variety of blower motor wiring diagram. Furnace Furnace Output (Btu/hr) (high) (low) Blower Power (W/kBtuh) (high) (low) Total Annual kWh Total Electric Usage (kWh/MMBtu) H 46,500 9.6 1,100 11 I 54,000 9.2 1.080 11 J 67,500 7.3 880 9 Gary V. Lv 4. He also said my unit was showing 1 lb low on refrigerant. rickdb1 Posts: 185, Reputation: 15. The typical furnace will draw about 8 amps of power. I have another motor on my RV turned a 25 amp fuse into a flash bulb. The FLA rating of the motor is 12 amps and the rated HP of the motor is 5 HP. The Burner has a motor to draw the oil out of the tank and a small pump to inject the oil past the ignitor. Have them operate a centrifugal blower in free air with no restriction and measure both the amp draw and the fan RPM. The 60 amp breaker usually feeds power to 2 elements which draw about 20 amps each. I was able to measure current draw. Operation in the lower speed is working. Somewhere inside the service panel of the furnace, there should be a schematic for the furnace. It is a good idea to have solar or generator power to supplement the charging of your batteries when not connected to shore power. Blower motor stops after about 20 minutes, but doesn't give an alarm code with no change in thermostat settings. I currently have the furnace-side High connected to the blower-motor Med-High wire, like when the heat was on. The amp draw of the gas valve. She said they got the furnace running but did not know how long it would last. The heat anticipator should be set to match the: The full load amps (FLA) of the blower motor. 20. What are the implications of a furnace inducer motor drawing high Amps? 1 decade ago. We measured the blower motor current on high, and it is drawing 19.5 amps on a 30 amp circuit. It is a … read more The NEMA MG1 motor and generator standard allows a ±10% tolerance on rated full-load current. What is the normal position of a limit control switch? I have an old lennox pulse furnace on the ground floor of a utility building, it is only used sporadically for air circulation not for heating. d. Both b and c are correct. 19. ONE the blower turns freely.. (you can access one of the two blower wheels from outside easily) and 2 that you are using the SPECIFIED fuse. I know that this is barely over FLA, but I normally see these 1/2 hp motors drawing 4-5 amps at maximum. Furnace blower motor [ 1 Answers ] While checking the unit today I noticed the motor that was replaced two years ago was drawing 7.7 with a FLA of 7.5, The service factor on the motor is 1.0. Blower and exhaust motors drawing less than rated amps, rust on coil and heat exchanger. Lissa, There should be a label, or plate on the unit that lists xx amps, or xx FLA. In their most basic form, furnaces are pretty simple. The furnace has had the blower motor replaced in it twice. I'm helping my sister-in-law with this issue. Effects of high voltage. keep looking. High voltage on a motor tends to push the magnetic portion of the motor into saturation. Does anyone know how many amps a blower motor draws on high speed for a kia reo 2004 - Answered by a verified Kia Mechanic We use cookies to give you the best possible experience on our website. I also noticed a strong buzzing sound from the blower motor. Here are three reasons why your air conditioner could be drawing too many amps, causing its circuit to trip. In a furnace, this heat evidences itself in the form of an amp draw. The "Stalled" current draw on a motor can be very high. The air filter is clogged. Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & more. If the amperage rating of the breaker (number on the handle) is more than what the unit is rated it shouldn't be tripping. a.

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