furnace control board 3a fuse blowing
Furnace was working fine through the summer blowing the AC. New to the forum so forgive me if this has been covered. A/C works fine on start. Surprise surprise, what happened? When it blows, the board flashes a low voltage/open circuit code. It’s quite aggravating when your air conditioner keeps blowing fuse in circuit board. Also, now there is no trace of snow or ice anywhere. problems contact webmaster@doityourself.com. Thanks for the quick response. A/C is okay, but no heat. Be sure that you replace any failed fuse with the same type and amperage. Finally he came in and he said that they think they found the problem. The unit now works fine in AC mode but still makes a clicking sound when it starts in the heat pump mode. I When a valve is unable to open and close properly, it can sometimes heat up, causing an electrical short that blows a fuse. Any ideas? By logging into your account, you agree to our. So the 2 black wires connected to O-rv and C-rv terminals are the wires to the reversing valve solenoid right? Heat pump clicking on start. Both condensors stopped running after huge snowfall. But, if it happens quite frequently, you have a problem on hand. Clicks for about 30 seconds then runs fine. 1.Disconnect all thermostat and outdoor unit control wires from the terminals on indoor unit control board.Turn thermostat to call cool and see if fuse blows.If it blows, the control board in unit is shorted and will need to be replaced.If not move to step 2. Lex Vance is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon .com#maintenancetechnician #multifamilyhousing #apartmentmaintenance #handyman #Tallahassee Gas and Oil Home Heating Furnaces - HELP!!! 10. As soon as you request heat the fuse blows and when I try to run the fan to on nothing happens. You need to find the root cause of the blown fuse on the furnace circuit board before you cause damage to the unit. When the furnace went out, I checked the circuit board and noticed I was getting code #24; "secondary voltage fuse is open - check for - short circuit in secoundary voltage wiring (24 VAC) wiring". It’s the main circuitry responsible for operating the components. This is reading zero so that equals high current which equals blown fuse. If someone is poking around your furnace and is not too careful, they could more wires so that they come into contact with the furnace’s wire frame, causing them to short and blow the fuse on the furnace board. Out the door I ended up paying $51 for the contactor relay and DCB another $36 for the solenoid coil (all replaced by me) then $49 for the service call and $100 for the Low Voltage Wiring Repair. View our Privacy Policy here. (Goodman ARUF48D14AC air handler and VSZ140421AA heat pump) On the chance it was just a bad fuse, I replaced it and it blew again after approximately 3 mins of air handler and condenser operation. And actually working better now that the aux heat actually works. Any ideas out there. I put in a new 24V transformer and a new control board. I am still popping fuses and reading over 24 volts. Here are a few of the most common problems: Strain: This is one of the most common reasons why the furnace fuse is blown. So I'm working on a sure comfort Nat gas furnace. Now just need to find and order a solenoid and figure out how to replace that. High efficiency models will cost close to $600 while simple, single-stage models may only run you $75 to $200, the price of a service call. Still blew the fuse. 3A Fuse on Circuit Board Keeps Blowing The 3A fuse on a furnace circuit board can keeps blowing because of a faulty transformer or damaged thermostat wiring. (PJ, you mentioned the new coil should be about 30 ohms, old one read 14 ohms and new one read 16 ohms, just passing on that info.) As the title states, I have a blown 3 amp fuse on the control board located in the air handler. The tops and most of the sides were completely covered with snow. Troubleshooting a Carrier Furnace / Air Conditioner.Amazon Affiliate Links I went through 2 more 5 amp fuses the same way. When the furnace went out, I checked the circuit board and noticed I was getting code #24; "secondary voltage fuse is open - check for - short circuit in secoundary voltage wiring (24 VAC) wiring". I have a Tempstar Model NTC6100KFG1 gas furnace. Yes.... 0 ohms between the two wires is a dead short. * I noticed that the start capacitor wasn't bulged. We welcome your comments and Bryant Heat Pump Model 661CJ036-A Within a 1.5 secs after I push door switch in the 3 amp fuse blows. Lv 7. The O terminal is tied to the O-rv terminal (reversing valve) on the control board. 3 amp fuse blows on control board of Rheem - I have a Rheem classic 90+ and the 3 amp fuse on the control board (part number 62-24140-02) keeps blowing. For the last couple years it has blown the 3a fuse on the board several times when we first turn the heat on before deciding to work normally for the remainder of the winter. The control board was even replaced by one outfit about two years ago at considerable expense, and ran fine for … If it’s just a one-time thing, you may not think much about it. https://www.facebook.com/dirtymaintenancenationcom-1223203057756838/?hc_ref=ARR_utg1N7QasuLf8v68hsS1_11kPd-JqSW3tG-j-bslz_lThHbKr7YxoaRU0-J2is0\u0026fref=nfThis page contains affiliate links, which means that if you click on the link and make a purchase, I’ll receive a small commission. (Goodman ARUF48D14AC air handler and VSZ140421AA heat pump) On the chance it was just a bad fuse, I replaced it and it blew again after approximately 3 mins of air handler and condenser operation. Disconnected the orange wire at the heat pump and the short to ground was on the heat pump side (not the house side). Heat pump, do I need to turn on aux heat when it's 10 degrees outside? Fortunately, many issues can be pinpointed and, in some cases, even repaired yourself. The voltage out of the transformer reads 26.3 volts. Thank you! Finally I disconnected all low volts wires at the air handler and tested individually to ground and found a short to ground on the orange wire. home improvement and repair website. Should the solenoid not be completing the circuit right now? 3A fuse blowing after furnace ignites [ 5 Answers ] 'Working on a 10-yr old Goodman GMP050-3. Relevance. Anyway, he had to call in reinforcements, another guy showed up and they spent 5 hours going up and down from the attic to the heat pump and back again. All rights reserved. I just assumed there's some sensor that stops the unit from running if it's covered with snow and cannot heat/cool and maybe it would start back up on its own. But for those who’ve recently encountered one common issue – a furnace blowing its fuse – before scheduling that tune-up, it may be due to one or more of the following reasons: 1. PJmax, thank you for your help, I look forward to using this site more for more DIY stuff and getting good advice. ran for 8 hours. Reading C-rv on the DCB to ground is a short (just a common line I'm guessing). If you haven’t been diligent about maintaining your furnace, all its parts will have been silently and steadily collecting debris and dust. DoItYourself.com®, founded in 1995, is the leading independent 1 decade ago . This is a split unit with a remote heat pump outside. Unit was making a clicking noise on start (in both AC and Heat Pump modes). The unit comes on, status light solid, ignitor glows, gas comes on and ignites, but after 2-3 seconds the 3A fuse on the board blows. * Both heat pumps are not elevated off the ground as they should be (they are newer systems are were installed by a very reputable/huge HVAC company - so I wonder if it's not needed for these newer units). But since then, I have checked 4-6 times per day and for a week straight, I have not once heard/seen either of the two running. They did not mention a specific location of the short, they just swapped to a spare wire. If I replace the fuse, the blower motor only will run for about 10 minutes before the fuse blows again. This tells me that the solenoid is completing a path for current flow from O-rv to C-rv. Apparently theres been somebody else here already. After reading some other posts, I checked the contactor in the remote unit, it cycled normally and coil read no continuity to ground but I replaced it anyway. I opened the panel on the Carrier furnace and found the 3 amp fuse in there was blown. HVAC electrical troubleshooting. The fuse was blown. Here's how to diagnose a low voltage short. Replaced the defrost control board (PCBDM133) and retested, blew the fuse. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. https://www.voltguide.com/furnace-3-5-amp-fuse-keeps-blowing After poking around a bit, I realized that the 3A fuse on the control board had blown. Apparently theres been somebody else here already. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, B1225022-Replacement-Goodman-Reversing-Solenoid, HVAC is blowing the fuse on the board when cooling kicks on, SER cable vs Conduit - Indoor subpanel ampacity/temperature questions, Looking to buy a new Home Theater amplifier, Furnace cycling on and off because of APS. Initial troubleshooting revealed burned points on the start relay and a capacitor that was more than 15% out of tolerance. Circuit board and ignitor were just replaced and the flame sensor has been cleaned. Ended up getting a "free" transformer out of the deal but all together spent a grand total of $236 and my heat is working again with no famous blown 3 amp fuse. After reading some other posts, I … Check the … It's been off for a month or two as we've been changing seasons here. I was running out of parts and ideas to throw at this thing so....I called a shop. Noticed the 3A Fuse was blown...replaced it and taped down the switch thats on the front of the unit. The black wires for the reversing valve solenoid go to terminals O-rv and C-rv on the DCB. Today the Air cond. I promised an update and here it is. The amplifying condition was that the short was only noticed after ~3 mins of heat pump operation and I never did any clamp on ammeter checks during operation. The furnace has been serviced numerous times over the past two years for various problems by multiple service companies. This is a split unit with a remote heat pump outside. I have a Jantrol GMP 100-4. * I have cut/restored power to both units hoping for a reset, but they still do not run. Pulled the 2 black wires for the reversing valve solenoid from the control board and the solenoid itself is not shorted to ground although the reading across the solenoid is zero. If you have a gas furnace, one of the valves may be failing. The only advice I could suggest is getting a resettable 3 amp fuse and a clamp on ammeter for the most comprehensive troubleshooting (or just a bunch of 3 amp fuses). Sometimes, your furnace may seem like it has blown a fuse, but it is actually suffering from loose wire connections. As the title states, I have a blown 3 amp fuse on the control board located in the air handler. I have a Bryant M/N 383KAV036070AGJA, S/N 3097A08913, Series G furnace with central air that is blowing the 3-amp fuse on the control board. This will blow the fuse on the control board, causing the draft inducer to not start, which then stops the rest of the furnace functions from working properly. You have your thermostat wires hooked up wrong. You are causing a dead short on the board. http://www.dirtymaintenancenation.com/Friend me on Facebook! Assorted Fuses: http://amzn.to/2zyNiTHHow to Fix a Furnace. I replaced both. Why is my furnace blowing out cold air? Long story but heres the background: I have a York gy8s080b16dh11b furnace that is driving me crazy. Favorite Answer. Your furnace’s control board has a separate fuse that protects it from getting too hot. Can you help? Copyright© Well I've looked and can't seem to find the answer I'm in search of so here goes. I recently moved into a new home and now have my 1st heat pump (two actually; 1 for upstairs and 1 for downstairs). After poking around a bit, I realized that the 3A fuse on the control board had blown. Dirt . Everything was working fine until I heard the A/C come on and heard a pop. I have Rheem HVAC system that is about 12-4 years old (its an R22 unit). This type of safety measure requires that the door be replaced before the current will be restored to the fuse panel. I disconnected the orange wire from terminal O and the short to ground was on the board.
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