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HOW DO I CHANGE SPEED ON MY FURNANCE/AC BLOWER?

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You always want the blower speed on your furnace to be on high in the air conditioning mode. Is it on high now?

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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2 Answers

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How to make sure you Heat is working


A common problem with a furnance is the furnance will attempt to ignite, several times, you will notice that the house is not heating properly. You will hear the furnance come on and you will assume the heat is on, and the house will continue to be cool. You wiil check the furnance and you will hear it start up and the blower will come on, however a few seconds later after you have walked away the blower will shut down and there is no heat on at this time. You will again go check the furnance and after the furnance start and go through the cycle the furnance will shut down you will notice that the furnance has indeed shut down. This is the common problem of the flame sensor, you will have to remove the flame sensor, get a small piece of fine grade sand paper, and remove all the black colored carbon from the flame sensor until is is shinning bright, replace the flame sensor and attempt to start the furnance. You will notice that apatment or house have reach the set temperture, that the furnance has went through its cycle and the furnance will ignite and stay on continueously until the house obtain the preset temperture..

on Dec 13, 2009 | Heating & Cooling

1 Answer

My blower motor wont turn off in my furnance?


check the fan setting on your thermostat. On means always on, auto/int means only comes on during heating/cooling. if the thermostat is set to auto / int and the fan keeps running? you may have a bad fan relay switch. It may be integral on the primary control board of your unit.

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1 Answer

Coleman electric furnace


You don't say whether you replaced the blower but that could be the next thing to check

Jul 23, 2013 | Heating & Cooling

1 Answer

I have a Johnson aire ease ultra 90 gas furnance. I also have a outdoor wood furnance that has its own thermostat. On the original thermostat I turn the blower in the on position. I then set the outdoor...


I would first eliminate one furnace from the equation, the exterior wood furnace... turn its tstat down. Will the gas furnace then operate normally? Can you run the blower manually, as in summer mode? Make sure your filters are clean also... that can sometimes overload the blower.

Apr 12, 2017 | Heating & Cooling

1 Answer

Gas furnance lights but fan does not come on. buzzing sound from panel near fan.fan is not jammed it spins freely.unit is seven years old.


Most furnaces equipped with an electronic control board activate the same blower speed for heating and continuous fan. If the cooling speed works, the problem is likely in the circuit board (relay) or wiring to the motor. Check and rectify.

Jan 11, 2011 | American Standard Heating & Cooling

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The ac is on full at all times, even when you adjust the fan hight. someone sayed i need a a/c auto amplifier. but i can't find that part


Good Evening, If I am translating this properly your fan only works on the high setting? And the other settings do not change the speed? If this is correct respond back and I will help as much as possible.

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Goodman A18-8 electronic furnance and AC troubleshooting.


Check the unit for a high temperature limit switch, usually a round bimetal disc or a square plate that
would insert into the unit. If the switch is bad, it opens up and the fan will run no matter what. Complete the circuit with jumper wire, if fan shuts off
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1 Answer

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This sounds like, the 550 transformer is not connected to the blower motor power connection (in parallel)

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