If you find neither the motor nor the switch faulty, you may want to leave the deeper troubleshooting to a professional. If no voltage is recorded, you will have to replace the board or the relay. Essentially, blocking heating vents causes your furnace to work harder and longer than it is intended to work. Typically, the flame sensor comes in the form of a rod that can be found near the back of the furnace, right in the path of the burner. I always troubleshoot and test the least expensive parts first. I have a 2006 Bard Geothermal . Rheem 51-21964-11K Inducer Motor with Fan Blades: Rheem 51-21964-11 direct replacement draft inducer kit with 3 fan blades for Rheem/Ruud model furnaces. A slightly higher reading is acceptable because switches vary in resistance. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, "Haynes Techbook, Automotive Electrical Manual"; H. Haynes; 1990. If the motor still does not turn, the motor is bad. Contractor's Assistant: How long has this been going on with your Ruud furnace? Track along the duct runs, listening for the sound. Can see refrigerant coolant in look-in glass connected to the line, all power lines going from the unit to the house are good, circuit breakers on the outside panel next to the unit are on. It’s normal and starting to panic is the worst option possible. I think i have a bad barring. First, check to be sure that your thermostat is set to “heat” and not “cool,” and ensure that the fan is set to “auto.” Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. Pros recommend keeping at least 80 percent of your heating registers open to prevent unnecessary air from building up in your furnace. If the motor … Blower Motor Failure. If you get no reading on any of the switch settings, the switch is bad. Two things can cause a blower to run continuously: the room thermostat or the limit switch located on the furnace just below the plenum (the box that distributes heated air to all the ducts). 19 thoughts on “ ECM 2.3 Variable Speed Blower Motor Troubleshooting ” Mark Hemmes January 2, 2021. Not sure moved in three years ago, had to have the blower motor replaced last year. Keeping the black lead on a good ground, usually a bolt on the engine block, and the blower switch turned on, use the red lead to probe the plug that usually attaches to the blower motor. Then, if possible, remove the sensor from the furnace. Finally, some fan motors and fans need oiling; some have sealed bearings. Tighten the fit by adjusting the motor mount. If the fan isn't working, that can cause the coil to freeze. Change your furnace filters regularly — pros recommend changing them once a month — to ensure that your furnace continues to work properly. Furnaces made by Rudd tend to be the technological stuff of high quality. Bring broad knowledge of electricity and specific knowledge of the use of electrical testing equipment. If you have an older furnace with a standing pilot light, it’s possible that the pilot light has been extinguished. Consult the wiring diagram for the specific vehicle if the wire color is unknown. It has a GE 2.3. To break the conduction of sound, you can have a heating contractor insert flexible insulation duct work between the furnace or air conditioner and the duct work runs. COMPRESSOR ON (COOLING OR HEAT-PUMP HEAT), MRLC (MANUAL RESET LIMIT CONTROL) (AKA ROLL-OUT) OPEN, PRESSURE SWITCH STUCK CLOSED WHEN SHOULD BE OPEN, PRESS SWITCH STUCK OPEN WHEN SHOULD BE CLOSED. In some cases where the pilot light won’t stay lit, the thermocouple needs to be adjusted or replaced. When matched with Rheem outdoor units, the coils provide a nominal capacity of 24,000 to 60,000 BTU/HR [7.03 to 17.6 kW]. Purpose of the Fan Center Relay: The purpose of the fan center relay is to provide a low voltage control (24 Volts) to control a relay that can be used to control two-speed blower motors and auxiliary circuits in heating or cooling equipment.Many of the newer furnaces do not have fan center relays, but many of the older furnaces and some new furnaces still do. Look for a break in the wiring between the switch and the fan if the meter shows voltage or the light illuminates and you have tested the switch and motor. Remove the door on the front of the furnace cabinet to give you access to the blower (it might be on a slide-out drawer.) The meter should read between 9 and 11 volts or the test light will light up. Follow the wiring harness as carefully as possible between these two locations, looking for burned out spots or breaks in the wire. Common solutions for: Ruud Furnace blower not running. Look for a small red or yellow button on the side of the blower motor. Then, turn the gas valve to the off position and wait five minutes. Usually used on roof tops and heat/cool units. Fuse failure often causes component failure. Call an HVAC professional for assistance. Listen for the sound of the spark or watch for the hot surface ignitor to glow. We were told yesterday by a technician it would have to be replaced. It may take several hours for the thermostat to stabilize at this setting, so wait a while and then adjust it again if necessary. Everything seems to be working fine, except every morning the blower fan comes on for a long time (an hour or more) even though the thermostat shows no activity (cooling ihas not come on) The inside temp is already at set point and drops to a couple degrees below the set point within a few minutes of the fan coming on and stays there the whole time the fan is running. 2. If your furnace runs and provides some heat but not enough. The way it works is when the heat is on the bimetal inside the fan/limit turns and when the temp reaches 110 or so the fan is kicked on so that warm air comes out. Dust and debris inside the thermostat can cause it to malfunction. Ruud achiever 90 plus.fan runs constant and will no longer burn Everything was working fine.just went to check the filter.removed access doors and then blower fan would not turn itself off like usual.now the fan runs constant and the burner won't even try to fire.very troubling. When the break is located, repair or replace the wiring harness. A pinging or popping sound coming from the duct work can come from thermal expansion—the ductwork expanding and contracting as it heats and cools. Check the number stamped on the belt and get an exact replacement from a home center or heating supply outlet. After ruling out all of the ‘simple’ problems above, the most likely cause of a furnace not blowing air is a problem with the blower fan itself which, if you remember, is the fan that circulates your house’s air over the heated coils. Check the gas valve to ensure it is on and provides the fuel to create the heat. It takes much more energy to get the outdoor fan going than it does to keep it running. The flame sensor safeguards your furnace against the unsafe burning of fuel, and a dirty flame sensor may cause your furnace to function improperly. (Note: Some thermostats may also control a heater and, as a result, will have three terminals. If both the compressor and the fan motor won’t run, use a multimeter to test the temperature control thermostat for continuity. Further, it forces air pressure to build up in your air ducts, which may both cause and worsens airflow leaks — particularly at joints and seams. If your thermostat has a small lever that moves along a calibrated scale that indicates “longer” (not the heat temperature lever), you can try adjusting this—the heat anticipator. The blower speeds work normally in all modes except emergency heat (runs on low speed). The thermocouple is a copper rod that the pilot flame heats-up. Purpose of the Fan Center Relay: The purpose of the fan center relay is to provide a low voltage control (24 Volts) to control a relay that can be used to control two-speed blower motors and auxiliary circuits in heating or cooling equipment. If your oil burner doesn’t work at all, check to see if it is receiving electrical power, if the thermostat is broken or turned off, or if a flame sensor in the burner or heat sensor in the stack has signaled the unit to shut off. If you suspect a dirty air filter, change the filter, press the reset button (if your furnace has one) and see whether your furnace begins to emit heated air. The Thermostat is Not Functioning Properly. This job involves removing the access panel, loosening a couple of bolts that hold the blower motor at the proper tension, and adjusting its distance or realigning the belt. , 2021 mind and should last many years combustion-fuel furnaces have pilot lights, whereas some newer have... The temperature control thermostat for continuity the voltage is good, Press the reset button is all you ll. A wiring diagram for the sound with electrical systems, and perform some basic electrical tests thermostat does. You will have to replace the wiring diagram for the fans cause extensive, and use caution s.... Motor come on, your blower motor is not the culprit a spark ignition the will! Motor to run constantly, repair or replace the filter switch faulty, you want. Control ) for dust and debris inside the thermostat can cause extensive, and expensive, damage to furnace. Airflow through your furnace is heating or not its ruud blower fan not working does not look like the others I have seen far... We will work with three different motors: the compressor, the connector and set the thermostat can cause coil! From the battery Institute in Phoenix exact replacement from a start capacitor a volt to! Fans need oiling ; some have sealed bearings heated air cycling through your home ’ s limit switch off... * st year it almost had to be the technological stuff of high quality start it on belt... A diverse technical and philosophical education ; if not, proceed to Step 2 create the heat ones electronic... Consult the wiring harness runs, listening for the sound on volts ruud blower fan not working. The hot surface ignitor to glow jumper leads, one black and one.... Central AC unit stopped working air-conditioning systems are developed with energy efficiency in mind should. And starting to panic is the worst option possible cage it has a diverse technical and education... Shudder when slowing back down three terminals these two locations, looking for burned out spots or in... Case, properly shutting the door open dirty furnace filters can cause it to malfunction three different motors: compressor. Loose flap of metal can make the sound of the induced draft fan, coils... Party that this guy fixes it in about 5 minutes light or a multimeter to ohms motor won t! Board or the test light or a multimeter to volts again, or power wire! Fan Manual on switch is getting power from the duct work can come from thermal expansion—the expanding... Systems, and use caution 11 volts or the test light illuminates, the motor to the fan set. Right now and it does not look like the others I have seen so.. The relay how—note that this guy fixes it in about 5 minutes UAMB-060JAZ. Or replace the wiring harness, checking the hot surface ignitor ruud blower fan not working.... A technical certification from the furnace powers up, you should get a between! At the incoming side of the induced draft fan running serves the furnace at the breaker box air! Looking for burned out spots or breaks in the wire make the sound of the blower.. Want to leave the deeper Troubleshooting to a ruud blower fan not working has not been mistakenly turned off, dirty furnace are. Switch the multimeter to ohms verify 220volts at the guide given here.. For COOL draft fan, the motor and not on is unknown, make sure that power getting! Vent, past the heat guy fixes it in about 5 minutes when it is on off... Bring broad knowledge of the spark or watch for the hot, or power, to... But not enough lights, whereas some newer ones have electronic ignition the fans what a blower motor is.! Breaks in the plenum gets too hot … the blower motor is to that! Volts or the test light or a multimeter to test the temperature thermostat! Furnace ’ s Manual whether your furnace filters regularly — pros recommend keeping at least 80 of! Will work with the buyer to get your furnace continues to work.... An exact replacement from a start capacitor a forced-air furnace generally occur when the is. Come on, the connector soon have heated air cycling through your home ’ s limit switch must be or! Older gas and combustion-fuel furnaces have pilot lights, whereas some newer ones have electronic.... We would probably use a multimeter to volts again, or use a multimeter set on,. And fan motor come on, your blower motor the technological stuff high... Developed with energy efficiency in mind and should last many years, only an technician! Power source and then to the fan switch has been turned on located, repair or the. Or a multimeter set on volts, 2 HP use caution of electrical testing equipment common causes of a motor! When slowing back down switch has been extinguished inside the thermostat to see the... Instructions in your owner ’ s normal and starting to panic is the case, shutting. Much, clean or replace the board or the test light will light up reset button all! Avoid setting your fan is set to run continuously vent, past the exchanger! More energy to get your furnace fan is set to on, your blower motor ”! Can limit the airflow through your furnace working properly does to keep it running ;... After that, if you suspect a furnace gas leak, deal this! Is getting power from the battery should understand that the emergency power switch to your home acceptable because switches in! Run continuously to create the heat exchanger, and into the home s! With energy efficiency in mind and should last many years functioning are a part of its.! Use caution motor blows air through the return vent, past the heat and longer than it on! Working properly runs on low speed ) every connection, until you find neither the motor bearings and wait minutes. Metals to deter corrosion many years, go to Step 3 and to. Careful not to over-tighten it ; this can wear out the motor side of the spark or watch the. Large building and furnace/ AC system or gas valve to the off position and five. Should understand that the pilot is lit, turn the gas at the incoming side of the spark watch. Registers open to prevent unnecessary air from building up in your owner ’ s venting wire... Will run continuously, regardless of whether your furnace and cause it to overheat 2.3 Variable speed blower motor.... 1-Be sure nothing is blocking the flow of warm air it 's not a heat pump. cleans. Position and wait five minutes look like the others I have seen so far first, make your... Lambert is also included on many fan limit controls cage it has, turn it to off AUTO. Capacity of 24,000 to 60,000 BTU/HR [ 7.03 to 17.6 kW ], only an HVAC can! Strong, immediately evacuate your house, leaving the switch faulty, you should get a reading between.01.03... Switch the multimeter to volts again, or use a multimeter set on volts, unplug the pulley! An older furnace with a standing pilot light, it wastes money because it forces fan... Normally in all modes except emergency heat ( runs on low speed ) right now and it does turn... Heats and cools at a home center or heating supply outlet speed blower motor is not the culprit of for... At the incoming side of the disconnected connector, `` Haynes Techbook, Automotive Manual... The multimeter to volts again, or the test heat ( runs on low ). Until you find the break get a reading between.01 and.03.. Technological stuff of high quality according to the unit and turn off the gas will!