Questions tagged [blower]

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11
votes
7answers
62k views

Does lowering the blower speed of a forced-air furnace lower its efficiency?

My gas furnace has two options for the blower speed: MED, and MED-HI. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. Does that have any impact on the ...
8
votes
3answers
3k views

Why are furnace/central AC blowers so inefficient?

I can buy a ceiling fan from Home Depot capable of moving 5,000 CFM of air for about $50, and it uses a mere 50-60 watts while doing it. By contrast, most furnaces seem to have blowers that operate in ...
5
votes
2answers
3k views

Why is my indoor A/C Blower randomly turning on and off only with Nest?

I recently purchased a Nest Thermostat (3rd Generation). My old thermostat was working perfectly. I wired Nest the Same exact wiring as the old thermostat which is : Y1 W1 G RH RC. With Nest, the ...
4
votes
2answers
17k views

What is wrong with my central heating?

I have a central heating system that was installed in this house in 2006. Tonight, while I was taking a nap my wife said that she suddenly heard a loud whine/whistle sound that slowly lowered in ...
4
votes
3answers
10k views

Why is my gas furnace vibrating when blowing hot air but not when blowing cold air?

I have a gas furnace. I recently replaced a bad blower motor. At that time I also cleaned out the blower housing and squirrel cage. The AC runs fine with no vibrations or any symptoms of an off ...
4
votes
1answer
7k views

Should I be concerned that the furnace fan is making a loud noise when it turns on?

About three weeks ago our 10 year furnace's blower motor (which also blows for the AC) died (the bearing seized). HVAC company comes out, removes the squirrel cage and motor, puts a new motor (with a ...
4
votes
1answer
5k views

How do I add a quiet blower or fan to a gas fireplace?

I have beautiful fireplace in my family room. It is gas rather than wood burning, and it vents straight outside. Due to the nature of how it is vented, I don't really get much heat from it, and I ...
3
votes
6answers
22k views

Air Conditioner Can't Keep up

We just rented a condo and our A/C cannot keep up so it will run almost constantly. It can't even keep the temperature constant, it will creep up into the 80s even while running. I measured the ...
3
votes
6answers
22k views

Where can I get an air compressor that can blow air (not just inflate tires)?

I have been able to find this and this, but they don't come with the fitting/handle that allows you to blow air - for instance, if you want to blow dust from your keyboard, etc. Does anyone know ...
3
votes
3answers
1k views

Can a furnace with a variable speed blower be used in a multistory house?

I just had an HVAC guy out to give me an estimate on a new Carrier Infinity series furnace and he said the second floor rooms will always be colder because the thermostat is on the first floor and not ...
3
votes
5answers
57k views

How do I wire an old furnace motor so I can use it as a garage exhaust fan?

Since last I posted, I moved WAY south (lil warm down here) and the house I moved into was a foreclosure so a few things needed done, namely the AC and furnace. When the guy did the job he said he ...
3
votes
1answer
11k views

Furnace blower motor runs briefly then turns off

I have an Amana AMH80804BN with a Nest thermostat (wires Y,C,Rh,W,G) and a 3 ton AC. I have been having issues with the AC portion the furnace (heat) seems to work fine. The AC will start out the day ...
2
votes
3answers
10k views

AC - frozen tubes, no air flowing when fan on and system off

Last night I realized my AC stopped working. I turned the thermostat to 74 degrees and by the time I woke up the house temperature was 80 degrees. My home has a single Carrier compressor (obviously ...
2
votes
2answers
19k views

Why is my furnace blower coming on so early in the ignition process?

Alright, I installed a new furnace a few months ago and have begun to notice an issue with the blowers. When the furnace first starts up, the exhaust blower should turn on to expel gas, then the ...
2
votes
2answers
6k views

Use external switch to control blower fan on furnace

We have a modern furnace with an old thermostat that controls heat and has a wire pair traveling to the furnace's control board. I'd like to wire up a local light switch by the furnace to manually ...
2
votes
1answer
11k views

HVAC blower comes on by itself. Even after thermostat has been disconnected from wall. EDIT- POSSIBLY FIXED

My TRANE XE 90 blower fan has a mind of its own. Even with the thermostat removed, it randomly turns on. It has gone a day without coming on (thermo off the wall the entire time) then just cycles ...
2
votes
0answers
1k 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 ...
2
votes
1answer
330 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 ...
1
vote
3answers
936 views

The blower on my HVAC runs sometimes when it should be off

The blower on my HVAC runs sometimes when it should be off. It does not run all of the time. The furnace is in the attic and the abnormal running seems to be related to the attic temperature. ...
1
vote
1answer
29k views

AC Blower running very slowly

I have a Ducane heat pump. When running in AC Mode, the outdoor fan and compressor kick off just fine. The blower fan seems to kick off as well, though it's not putting out very much air. I can ...
1
vote
1answer
2k views

How much power/electricity should my central air's blower fan use?

Main Question I've already visited this similar, but different question and saw a commenter mention that about 500W seems appropriate for blower fan of an HVAC system. The past few months we've had ...
1
vote
2answers
2k views

Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace?

My furnace blower is rather loud and runs at one speed. I wish to have the blower run at a slower speed to mix the air in the house when the heat is not called for. I see some furnaces have ...
1
vote
1answer
56 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 ...
1
vote
1answer
845 views

The new GE blower motor is missing an orange wire, how to connect it properly?

My old GE blower motor had an orange wire. Unfortunately, the new replacement motor has no orange wire. The new motor will not start up with just the black, blue, yellow, red, and the 2 browns going ...
1
vote
1answer
692 views

How to set Nest Thermostat to control blower without heat

I have a Lennox G14Q3 propane furnace (forced air). I used the Nest/furnace setup last winter without any problems with just the W and R terminals. But, these summer days I would like to push air ...
1
vote
2answers
4k views

Goodman GMP 100-4 Red light blinks 4 times [closed]

As the heading says I bought a used Goodman GMP 100-4 and the red light on the board blinks 4 times. As soon as power is turned on tho the Furnace I hear a click and a few seconds later the blower ...
1
vote
1answer
322 views

Blower shut off but the AC unit ran for 20-30 minutes afterward

Last night I turned my AC down a couple degrees before going to bed. The AC was running at the time, so when I set the temp below the current temp, the blower turned off. After getting in bed, however,...
1
vote
2answers
124 views

Run HVAC fan throughout the day for comfort

At my old house, we replaced the HVAC with a high efficiency unit that came with a thermostat that would blow, say, 50% to 70% of the time for air movement to increase comfort level. I'm not sure but ...
1
vote
1answer
11k views

Troubleshoot AC issue, no inside blower

I need help troubleshooting Rheem RAHE-036JAS, Armstrong G1N80AU125D20C-1, Honeywell ST9160B 1068 Board, Honeywell SV9520H 8034 Gas Valve. About a week ago, AC and Heat were working fine. After ...
1
vote
1answer
4k views

How can I stop the humming produced by my water heater blower motor?

Plumber installed a new Bradford White 75 gallon gas water heater with power vent. The first blower motor started a high-pitched whine/squeal (bad bearing?) approx 6 months after install. Motor was ...
1
vote
2answers
1k views

Why does the blower in the attic vibrate during heating when it is really cold?

We have a Carrier heat pump system in our home, and the blower is located in the attic. When it is especially cold, the blower runs on high (there are three levels: high, medium, low). During this ...
1
vote
1answer
53 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 ...
1
vote
0answers
392 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 ...
1
vote
0answers
273 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 ...
1
vote
1answer
895 views

Air handler turns on even when set temp is reached

My HVAC is a heat pump system, the air handler inside is a Goodman aspf183016ea. The whole system/house is about 3 years old, and is all electric. I recently moved into the home and noticed that the ...
1
vote
0answers
2k views

Is it safe to use a blower to clean debris off a shingle roof?

I would like to routinely (once a month) clean the debris (leaves, sticks, pollen, etc.) that collects on my shingle roof because of the shallow pitch: Rather than use a soft broom to brush the ...
1
vote
0answers
592 views

How do you remove the blower motor from a Lennox G40UH-48B-090-02?

I have a Lennox G40UH-48B-090-02 blower motor which sounds like it needs to replaced (Excessive noise and vibration). It is mounted horizontally so that when I remove the front panels, the inlet and ...
0
votes
2answers
64 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 ...
0
votes
2answers
85 views

Why doesn't my air conditioner fan come on when the condenser starts?

I have a York heat pump…the condenser is coming on but the blower motor isn't. Model# F6FP030H06T3XH. My blower motor doesn't come on but the condenser does when cooling is called for. Relay is good......
0
votes
1answer
304 views

Should there be a cap next to my furnace ac drain?

In the picture below, the left side has a good amount of airflow while the ac/blower is running. The tube on the right is the drain that the condensation flows out of to the floor. Should there be a ...
0
votes
2answers
43k views

Blower fan doesn't work in cool/auto or on modes

I've read the posts with the opposite issue, which have been helpful (you guys are amazing!) but still no solution. Problem is that the blower fan does not come on when system is on "Cool" and fan is ...
0
votes
1answer
68 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 ...
0
votes
1answer
25 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-...
0
votes
1answer
24 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 ...
0
votes
1answer
555 views

Blower Motor Single “Stutter” when Condenser comes online

I recently moved into a new home. This home has two stories and each story has its own AC system. Both units were replaced about 2 years ago. Both units are 3 ton Carrier Units. Everything is ...
0
votes
2answers
167 views

Issue with Blower Motor Not Spinning Up

I have a Dayton Blower motor. Model 3K617K. It has a clutch that is supposed to engage when it spins up. However mine never gets up to speed. It turns, but slowly and constantly makes the loud humming/...
0
votes
1answer
878 views

Low speed furnace fan blower motor will not shut off

I have a carrier furnace that has a low speed fan blower motor that will not shut off no matter how long I leave it running. I checked that removal of the G wire at the control board does not change ...
0
votes
1answer
1k views

Goodman furnace ignites but fan won't run

My Goodman furnace burners ignite fine but fan never starts. Have I got a bad fan motor? LED blinks 4 times for High Limit Switch. I've removed the switch and shaking it softly you can hear the ...
0
votes
1answer
3k views

Blower fan works w/ a/c “auto”, not with heat “auto”

I know there are similar questions out there but are there any new ideas? When I turn on my heater, the gas fires up but the fan doesn't turn on. I know the fan is still working because it will turn ...
0
votes
1answer
49 views

A/C blower stays on all the time but heat and cold work when thermostat sends signal; how to fix?

There are 2 hot lines (white wire that goes to heating contact & Blue wire that goes to furnace limit switch & both of those are hooked on same side as wire coming from main power wires) that ...