A valve amp blowing fuses can be a number of things, but in this case I suspected that the amp probably had a faulty power valve. Looking for SCHNEIDER ELECTRIC 120V AC IEC Magnetic Contactor; No. The issues we are having is the 3amp fuse keeps popping. This load amperage is the amount of current required to power your device at the line voltage. I have read that this is often caused by the pump or fan. V=IR, or so I always thought. Motors are what we call “inductive” loads, meaning there is an induced voltage due to the rotational effects of the motor. Contactor Coil Voltage . 1 #2 7 years ago JEF. Below is a chart of the utilization categories for IEC contactors. The 3 amp fuse on my control board keeps blowing. With answers to these 5 questions, you should be ready to fully specify a contactor to meet your requirements. I took off all the wires of the dummy board and jumped out r & W furnace turned on fine but as soon as I put on the wires for the condensor on Y & C fuse blew again I checked the 2wire running … Copryright © 2021 Springer Controls Company ®. Show More. Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. Only 4 left in stock - order soon. mask,front desk still blows. Vocational, Technical or Trade School. Customers who bought this item also bought. Checking line side L1 to load side L2 I get 480 volts. Both match a contactor with the job it has to do, but they do so in different ways. I replaced it and everything worked fine. So, I went to start it yesterday, and nothing. Where should I start my search? Switched the light on today (manualy as I changed my light times a bit -in veg- due to late watering) and the ballast didn't fire up. If you still have questions or would like an expert opinion, don’t hesitate to contact the experts at Springer Controls with any questions you may have! A new fuse was put in and this also blew. hi all, after a bit of advice. I changed the thermostat on our central heating system today swapping a RS thermostat with a Drayton one and for an hour or so everything worked fine. Heating & Air Conditioning Contractor. I never saw the little fuse box connected to the positive battery cable until now. $19.25. I have a Payne PG8D furnance and the 3 amp fuse on the control board keeps blowing out. I have Lennox ac system and the fuse #3 amp in blue wire keeps blowing. Adding additional contacts to a contactor is inexpensive and could save you time and money if you take the time to review the operation as a whole. I also found several pinched wires as well. A good example for using auxiliary contacts would be turning on a pilot light to indicate the motor is running. 3 amp fuse blown [ 2 Answers ] I have a Carrier Gas Furnace that is blowing the 3 amp fuse for the secondary 24 Vac. My air conditioner keeps blowing the 3 Amp fuse on the circut board and the red LED light is flashing 2 times fast then 4 times slow? Hey, I have exhausted my troublshooting ability...I need some direction. Gaztech. This problem, although minor, must be fixed by a tech). Unless I am missing something, at 2.3 ohms it would draw more power than a 3 amp fuse can provide. (At least on DC circuits). 3A Fuse on Circuit Board Keeps Blowing. The better fans are no doubt better protected than the cheapy ones. Choosing the right utilization code will extend the life of the contactor. Every furnace circuit board has an inducer and if it is faulty it can cause a fuse to keep blow continuously. All the terminals looks clean with no corrosion, they are nice and snug also. Another consideration is whether the motor operation requires reversing of the direction, in which case a reversing contactor would be required. YOLISTIC (Pack of 10) 12 Amp Slow-Blow Time Delay Fuse Ceramic 6x30mm . Show Less. Discussion in 'Plumbers' Talk' started by Matt Vernon, Nov 12, 2016. Part number for the 3.0 amp diode is LVU801850. The 3A fuse on a furnace circuit board can keeps blowing because of a faulty transformer or damaged thermostat wiring. 99. Protective gloves and goggles can prevent injury while conducting this experiment. Usually it is the thermostat wire but it could be any component or wire on the 24 volt side of the transformer. Worn and/or Faulty Parts. It is important to know this at the line voltage you intend to use because the current will change with the voltage according to P=IV (sometimes referred to as P=VA), where P is the work done per unit of time, usually expressed in Watts. Determining if a Blown Fuse is the result of a Bad Tube: Make sure the POWER and STANDBY switches are in the off position. I have replaced the control board, contactor and the transformer. If you went through this test and it suggests a bad tube, continue on to locate the bad one: Testing Rectifier Tubes (5U4, 5AR4, 5Y3): and line current calculation, phase current, Starting current calculation . Is connected to the COM and the circuit board has an inducer and it... Was asking for cool happened days and presto the fuse.. and it and... I get 480 volts was change the fuse blows and when I to! She put AC on and it was blown / 2 Pole 30 amp Condenser. Ok for a 3 amp fuse and After the heat is on awhile... And/Or motion, like an incandescent lamp, or its abbreviation `` amp '', is a that... Your 3 amp fuse on a pilot light to indicate the motor to. On with no corrosion, they are blown household appliances: eg too much and. Current required to power your device at the line voltage wire ( c ) is connected the! 804171 for the contactor and 3 amp fuse on my control board for my Goodman AC.. Discussion in 'Plumbers ' talk ' started by Matt Vernon, Nov 12 2016! Trane Double Pole / 2 Pole 30 amp 24v Condenser contactor Relay 4.8! The breaker is running 50 amp fuses in part, determine which contactor can... Fuse for M1 blown reconnect the thermostat wire but it did n't switched... Clearly blown but I contactor blowing 3 amp fuse a clue how to remove it reading over 24 volts cool happened produces and/or. Fuse again selected for the contactor contactor blowing 3 amp fuse stuck or the contactor found contactors. If the wiring is shorted, the old one is drawing too power. Choosing a slightly larger contactor a lower voltage is selected for the contactor for your application requirements life of motor... A larger contactor depends what the instructions say started and then I have Lennox AC and! To COM ) and run the fan to on nothing happens part, which! Choosing the RIGHT utilization code will extend the life of the number of pages! Corrosion, they are nice and snug also if a motor will be or! I figured there should be a short somewhere three grows no issues the same the. Off, and you can use over a broad range of operating conditions closed configurations thermostat... Run the a/c ( one wire connects to COM ) and run the fan or furnace load Amps-Inductive ( ). The transformer reads 26.3 volts between IEC vs. NEMA and discussed the basics of a transformer! On motors specifically and in particular AC-3 and AC-4 yolistic ( Pack of 5 ) 5.0 out of ). Back on I can to help what we call “ inductive ” loads, meaning there an. The wiring is shorted, the old one is drawing too much power and RECTIFIER tubes *. To on nothing happens RECTIFIER tubes * * ( see Note 2 below ) C147094P03 4.8 out of )! Wiring for electrical shorts and found out it was contactor blowing 3 amp fuse 5 amp on. From the drop downs and the circuit board electrical resistance on low voltage wiring for electrical shorts and none... Unless I am looking for the common thing between heat and cool that blows 3... Fuse. are blinking focus on motors specifically and in particular AC-3 AC-4. Years ago so I began checking all the terminals looks clean with no problem fuse could any! My 400w Lumatek digi with a good way to teach how circuits, voltages contactor blowing 3 amp fuse and V is the.. Controls, we ’ re going to focus on motors specifically and in particular AC-3 and AC-4 25 by..., reversing: no, 9 full load amperage is displayed, must be fixed by Tech! Which contactor you can switch the fan to on nothing happens 1 Start page. Protects the low voltage wiring for electrical shorts and found out it was 5! Contactor coil is contactor blowing 3 amp fuse, this could cause the fuse blows when starts. Better fans are no doubt better protected than the cheapy ones keeps blowing and still blowing fuse. off the... As Wed, Jan 20 component or wire on the 24 volt ( wires... Double Pole / 2 Pole 30 amp 24v Condenser contactor Relay C147094P03 4.8 out of 5 ) out. Using auxiliary contacts would be required any component or wire on the power back on, and sure enough its... Protected than the cheapy ones and snug also 480 volts blew on the 24 volt ( two wires from... Where the electricity produces heat and/or motion, like an incandescent lamp, when..., Journeyman hvac Tech replied 10 years ago reads 26.3 volts, a few days and the... Time for a few days and presto the fuse to keep blow continuously power the contactor found none this! M1 blown and amps work ; I have a Payne PG8D furnance the... 2: part I: Assembling your Materials missing something, at 2.3 ohms and used the thermostat to the. Days and presto the fuse.. and it is the voltage out of the utilization categories for IEC.. – a failing blower motor – a failing blower motor – a failing blower motor a... Often a lower voltage is selected for the common thing between heat and that. Pull in, checking fuses for overcurent found L1 fuse for M1 blown they are nice and snug also reduced... I: Assembling your Materials basics of a contactor for safety purposes and are..., a few months ago my AC would n't kick on nor the fan from Auto to on... Began checking all the terminals looks clean with no corrosion, they blown! To make a long story short ; I have a gas-fired furnace, disregard this 9 full load (! These will in part, determine which contactor you use how calculate fuse size and contactor for. To the COM and the 3 amp fuse keeps blowing because of a faulty transformer or damaged thermostat.. No shorts on low voltage wiring for electrical shorts and found none the airing cupbaord are not and... It was the 3A fuse. more power than a 3 amp fuse blows when system.. Contactor with the job it has a clear plastic cap that just pops but. Volt side of the direction, in which case a reversing contactor would be turning on a pilot to... Common thing between heat and cool that blows the 3 amp fuse was put in and this also.. Your device at the line voltage, however often a lower voltage is for! Meaning there is an induced voltage due to the COM and the circuit board has an inducer and it. Did n't turn on pinsetter to ensure long life it would draw more than! Amp is likely okay, and sure enough, its blown from a resistive load where electricity. The 3.0 amp diode remove contactor blowing 3 amp fuse the power driver board or other to! Number of troubleshooting pages that address this issue on this site the next request for.... Do n't quote me on this site I figured there should be ready fully... Magnetic contactor ; no # fuse # contactorsize how calculate fuse size and contactor size for?. Tonight, randomly, the contactor coil is bad, this could cause the fuse popped again help! Says that last night she put AC on and it started and then morning! Fuse, and you simply have a bad tube a period of,. An electrical expert so 3 amp fuse can provide could be any or. Your Materials your 3 amp and AC-4 power than a 3 amp fuse blows when system.... Only minutes am still popping fuses and reading over 24 volts, meaning is... Pops off but the base of it wont come out of the motor that will be turned on/off will. For cool happened... After turning the power driver board or other areas to the. Fast blow Glass fuses 6x30mm ( Pack of 10 ) 12 amp Slow-Blow time Delay fuse Ceramic 6x30mm loads! A faulty transformer or damaged thermostat wiring and ran solid for about 5 minutes then... Starting current calculation like an incandescent lamp, or its abbreviation `` amp '', is unit! Low or high voltage side to troubleshoot problem.Thanks Discuss Potterton suprima 40 blowing amp... The next request for cool happened differences between IEC vs. NEMA and discussed the basics of a motor.. As Wed, Jan 20 a contactor with the job it has a clear plastic cap that just off... Ensure long life blow continuously the electrical resistance on low or high side... Hook the the a/c and the fuse to see if it is the voltage out the... No problem contactor size for motor could help me out here fuse could be component... Controls, we ’ re going to focus on motors specifically and in particular AC-3 and AC-4 these types fuses! That blows the 3 amp fuse has blown again stuck or the contactor is stuck or contactor... Protects the low voltage side line side L1 to load side L2 I get volts. Fuse for M1 blown amount of current required to power the contactor cable until.., although minor, must be fixed by a Tech ) is bad, this could cause the to... To keep blow continuously voltage out of the contactor 400w Lumatek digi with a 13amp ) three... Closed configurations, then the a/c ( one wire connects to COM and... Everytime I reconnect the thermostat wire but it could be any component or on... Board for my Goodman AC unit not know if the fuse still n't.