Questions tagged [blower]

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blower motor wiring

hoping someone can help me verify my wiring to a AC blower motor. I think I have it wired correctly, I followed pics I took before I swapped out the motor. According to the diagram on the motor, black ...
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1 answer
72 views

Why does my furnace blower turn on when the thermostat is turned off?

The weather has been nice so we have had our thermostat turned off for about a month. The other night it turned on randomly and started blowing warmer to hot air getting the temperature to 78 degrees ...
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15 views

Ac Blower runs sometime

My ac blower works great but sometimes when the ac unit cycles on again it doesn't work I have to turn off power for awhile then it works sometimes days before happening again. I replaced capacitor ...
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0 answers
10 views

Does this sound like a bad bearing on the blower fan? (burner of oil-powered boiler)

There are a number posts about whining sounds, but it's hard to know if the posters are talking about the same kind of sound I'm hearing. It's coming from the burner of our oil-powered boiler but I ...
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16 votes
1 answer
3k views

Does anyone know what this fan blower thingy is?

I initially thought it was some type of paint mixer then realized the end would not fit in a drill.
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0 answers
58 views

Furnace starts but Blower doesnt start

I have been having challenges with my furnace starting last winter. Every now and then the furnace doesn't start. When I go down to HVAC and open the panel and force it to restart, I see the filament ...
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Trying to wire a replacement fan blower motor to the circuit board of an old Rheem furnace which has extra wires compared to the old

Old blower motor had the following coming from the blower to the circuit board: 1 brown to the right side of capacitor & 1 white to the left side (also had a "pigtail" white wire on the ...
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7 votes
5 answers
3k views

Will a PVC weld cure to fill 1 mm?

When we PVC-weld an ending with a flexible pipe, the pipe is usually very snug in the ending. The weld makes the bond permanent and ensures that no fluid can pass through. I'm trying to double-purpose ...
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2 answers
79 views

How to wire 2 ton ac blower for shop fan?

This is the blower I'm trying to be able to plug in. Capacitor is already connected.
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0 answers
64 views

Blower fan comes on once a week

I have basic two wire thermostat, one for power on for neutral. I only have central heat, not air. My blower fan kicked on the last two sundays, but itself, but not today which is sunday. It only ...
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0 votes
3 answers
120 views

AC blower unit stops working intermittent

hoping someone with more knowledge then I, can guide me on this. Recently my central AC's blower unit stops working intermittent after its been on for a few days with no issues. When it stops working, ...
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  • 117
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4 answers
176 views

Practical ways to reduce rattling noise in furnace?

Our bedroom is right above where the furnace is in our rented apartment. The furnace below makes a lot of noise, especially a rattling noise. Landlord is refusing to take any actions on it saying it ...
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1 vote
2 answers
346 views

Blower will not run in fan only mode

I am trying to determine why my blower motor will run when the thermostat calls for AC and Heat but it will not run when I switch the thermostat it to fan only. I recently replaced the old Honeywell ...
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1 vote
0 answers
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Heat Pump Compressor not turning on in heat mode

UPDATE 29-MAY-2021: So I have it working now, after playing around with some of the settings in both the Nest Thermostat and the Zone Control Panel. In the "Pro Setup" section of the Nest, I ...
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0 answers
18 views

How should I connect new thermostat wires to my heat pump?

I need some direction on troubleshooting my HVAC heat pump. I have recently purchased an older home with a newer heat pump was installed. There was no power to the thermostat. Called repairman and he ...
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1 vote
1 answer
51 views

Hvac damper types - which one is quietest

I'm trying to minimize noise in a lampwork shop exhaust system. The system consists of a 1/2 hp squirrel cage type blower connected to the shop space with 8" round ducting. I am installing a ...
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1 vote
1 answer
119 views

How to ground a kitchen exhaust blower fan?

Recently our kitchen exhaust fan stopped working, only humming and not moving. In the kitchen there's a butterfly damper, the exhaust switch is on the vent hood, and the motor and exhaust fan are on ...
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0 votes
1 answer
58 views

How do you wire a current sensor to multiple fans?

I have two booster fans that I only want to run when the main HVAC blower fan is on. Each fan will have its own speed controller. How do I wire them both to the same current sensor switch? Should I ...
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-1 votes
3 answers
279 views

How much PSI does an Electric Duster have?

I bought an electric duster for use in cleaning a PC, however I would like to know how much PSI do electric dusters generally exert. I can't convert cfm to psi, because the two units are incompatible -...
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1 vote
1 answer
344 views

High pitched whine from either the furnace blower fan or motor

There is a loud whine or scraping sound especially when the 11 year old Furnace Blower Motor/fan starts up. With power off, when I turn the blower motor fan blades by hand they make a scraping high ...
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2 votes
1 answer
384 views

Why is my blower motor drawing 12 amps on low speed - and can I do better?

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. I replaced the blower motor about 4 years ago (original ...
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2 votes
0 answers
72 views

Blower turns on before furnace ignites

I have not relocated/changed the thermostat or had any work done on my furnace. The fans turn on well before the furnace starts giving off warm air, which blows a lot of cold air into my home. I have ...
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0 votes
1 answer
50 views

Should furnace blower run when the heat is off?

Our furnace blower is set to auto....it runs when the furnace is and is not calling for heat but the humidifier is on. This is a problem because the forced hot air system is blowing cold air which ...
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0 votes
0 answers
38 views

Why does my furnace blower work intermittently?

On my Goodman 3.5 ton AC/ furnace, the blower seems to only run when it wants. I changed the capacitor on the blower twice and the thermostat once- same. If it doesn't start, I turn it off for 5 ...
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0 votes
2 answers
153 views

Husqvarna 125b Leaf Blower not running correctly

It only has a few hours on it and may have been stored for an extended time with fuel mix in it. It starts quickly but when I give it full throttle it bogs down. If I pump the throttle lever it ...
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0 votes
0 answers
24 views

Blower problem on central unit

Just installed a new "smart" thermostat. The fan works on both the heating and cool setting when it is on auto. When I set it to the run position I get nothing. Is there a wiring issue?
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1 vote
0 answers
155 views

Furnace fan turns off when compressor turns on; unit freeze up

I have a goodman HVAC (model: GMS950904CXA). The unit froze up the other day. When I turn the thermostat to cool, the compressor turns on, the furnace blower fan turns on for a few seconds and then ...
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2 votes
2 answers
266 views

ECM Blower Motor Not Working at Night

So, I have had this problem going on for about a month and a half now with my A/C. Throughout the day, the A/C will work fine. However, there will come a time in the middle of the night when it ...
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0 votes
1 answer
23 views

Trane VX99 furnace fan to run

I would like to have the fan turn on and blow non-a/c. I only see 2 wires coming from the thermostat. In
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2 votes
1 answer
875 views

Changing blower motors with different wiring schemes

My blower motor crapped out and I got a basically new, used one for cheap but only realized after the fact that they were wired differently. Basically I'm attempting the opposite of this previous ...
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2 votes
1 answer
32 views

Aftermarket Variable/Multi Speed Blower Kits

I have a 3 year old Trane Furnace TUD1A040A9241AB with a 2 ton Cooling evaporator 4TXCA024BCHCBA. I believe it is a single speed blower or if not, I would like to figure out how to limit/eliminate ...
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0 votes
0 answers
69 views

Carrier furnace blower doesn't kick up to high

I have two Carrier furnaces in my home. One is 100btu the other is 80btu they use the same the mother board. I have an outdoor wood boiler that heats our house and the furnaces are only use for back ...
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2 votes
2 answers
3k views

ISSUE: Snowblower pushes snow (forward) rather than throwing snow out of the chute

I have an old Craftsman 3/21 snow-blower (Model: 536.884581). The snow-blower starts perfectly, motor runs perfectly and the auger spins when the drive is engaged. When I use it to blow snow, it “...
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0 votes
2 answers
2k views

Furnace Blower Motor fan hums but wont start

Furnace Blower Motor fan hums but wont start until I turn it by hand, then it runs fine. What should I check?
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1 vote
1 answer
76 views

Why is my HI HEAT terminal causing blower to run non-stop?

I am trying to troubleshoot what is causing my blower to run non stop (the condenser (outside unit) comes on only when cool is required). There is no issue with cooling the house. I read through all ...
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-1 votes
1 answer
67 views

AC Fan/blower not shutting

My AC unit is working just fine and shuts down at/below set temperature. However, the AC fan keeps running all the time even in auto mode. The only way I can shut down the AC fan is to power-down my ...
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  • 185
-1 votes
1 answer
546 views

My blower fan won't turn on unless AC is running

So first of all, I've changed nothing: same thermostat and same everything. I typically run my blower fan 24/7, but a few days ago it stopped working unless the AC is on. Which tells me that the ...
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0 votes
0 answers
35 views

blower on Goodman Furnance/A/C is working but only slowly, barley pushes out heat or A/C

Furnace and A/C work, blower fan is spinning but there is no force coming out of the vents, almost a whisper if any
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0 answers
35 views

Installed new blower with problems

Had a problem a few years ago with my blower motor. Tech who came to my home said he would save me money as it only needed to be oiled. Worked fine for 5 years after that. Recently I noticed that ...
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1 vote
1 answer
1k views

Furnace blower motor starts but then starts clicking and eventually stops with a loud buzz

I have a Bryant furnace with a multi-speed blower. Yesterday I just replaced the capacitor and confirmed it is still working. The furnace turns on fine and the blower motor starts up when expected. ...
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2 votes
0 answers
10k views

Blower fan won’t come on in “auto” mode but will in “on”

I have a Honeywell model number NHGK076AF01 propane furnace. It is about 15 years old. The problem started when I noticed the breaker had tripped and I had no heat. After resetting breaker, I tried ...
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0 votes
0 answers
33 views

When heating, furnace blower turns on only in "ON" mode, not in "AUTO" mode

I have a York unit that is having problems with the furnace. The furnace turns on but the blower doesn't turn on when set to "AUTO" mode, only when in "ON" mode. "AUTO" works fine when cooling. Any ...
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1 vote
0 answers
1k views

How to stop the humming noise coming from my gas furnace when on Auto Heat?

My gas furnace makes a humming noise when on Auto Heat, like as if the blower motor or capacitor was bad. However, the blower turns on and sounds fine when thermostat is set to fan ON rather than ...
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0 votes
1 answer
175 views

Carrier Furnace 58STX110-14122 fan starts the first time, but fails to start at subsequent calls for heat

On a Carrier Furnace model #58STX110-14122, when the initial call for heat comes on, everything works just fine in the following order: Thermostat sends a call for heat Draft Inducer motor kicks on ...
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0 votes
1 answer
34 views

HVAC blower often (but not always) gets stuck ON.

I have a mid 1970’s G&S furnace. The blower often (but not always) gets stuck in the on mode even when heat isn’t being called for. The only way to stop it is to unplug the unit. Re-...
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0 votes
1 answer
30 views

HVAC blower control in several rooms

At my church we have lots of HVAC systems. Some of the systems condition several rooms. As you know, you can't make everyone happy at one time. The thin older ladies in one room are freezing and the ...
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0 votes
2 answers
211 views

How can I extend the length of my furnace run time after burner shutdown?

My new furnace has a control board with preset blower run times after thermostat satisfies. Max setting is 180 seconds. This is not enough to purge the latent heat in the heat exchanger. I need ...
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1 vote
1 answer
80 views

Range Hood - external blower: Is the design different?

I'm looking into installing a range hood. I'd like to install the motor in the next room, right on/in the wall that has the exhaust port. There are many companies offering external motor/rotor ...
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1 vote
2 answers
2k views

AC Blower Motor not working during night

The blower motor in the furnace stops working at night most of the time when the AC should be on. The blower motor (in the furnace) might run for one or two cycles at the beginning of the night but ...
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1 vote
0 answers
510 views

Trane xv90 blower won't come on regardless of what the thermostat is set at

I have a trane xv90 and the blower won't come on. I'm getting about 20 green flashing lights and then 1 red which kinda overlaps the 21st green. What does it mean? I had turned on my trane air ...
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