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Whirpool furnace model fs643-125cr can you change bloerw speed

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  • harpy03 Jul 04, 2008

    put 3 ton unit a/c in and a coil icing up charge is okblower seems very slow on gas furnace

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Changing blower speeds can often cause bigger problems somewhere else in the system.More is not always best.What do you hope to do?

Posted on Jul 04, 2008

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Posted on Jan 02, 2017

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Atwood 1522 LP furnace fan operates at one speed only


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Tip

Furnace Troubleshooting


On some natural or LP gas furnaces, the blower motor has to come on 1st
and then shuts off. This process starts the inital call for heat. If you find
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When changing the fan to on, you are changing the speed, if the heat comes on, that means you have a burnt out speed on your blower motor.

If nothing happens, change the fan speed at the control board.
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1 Answer

Can I change airflow direction with Goodman GMS8?


I would probably use a furnace for the correct application. However some motors do have a reverse speed connection. Besides the blower speed taps,
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What is the efficiency rating on the Trane model BLU055E936B1 upflow furnace and what new furnaces are available to replace this old Trane furnace without having to change the venting system.


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My intertherm furnace (old model) has recently getting quite loud and clunky during its heating cycles, sound like the blower maybe??


Your blower motor has several speeds to it and by the problem you are having it sounds as though the blower motor may be going out. The motor has a slower speed for the heating cycle and since you have the noise in the heating mode I suggest having the blower motor changed as soon as possible since it could cause other problems in the heating section of the furnace( possibly burning out the high limit switches). Good Luck on your repairs hope this helped

Dave

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1 Answer

The furnace send signal to the fan in about 30 seconds, now this fan is set in auto from my termostat, my problem is the fan is starting slowly and some time it don't start, but if I use the option manual...


Depending on the model of the furnace, the blower is either a 2 or 3 speed. When the furnace operates in heating mode with the thermostat in the auto position, the furnace starts the fan when the furnace reaches a specific temperature or after a set time delay, but it operates the fan in low or med low speed on heat mode, when you put the thermostat fan switch in the "ON" position, the furnace operates the fan in "HI" speed, the same speed used for cooling mode. You may have a blower moter that is starting to short. I would recommend having a professional replace the motor before now before it becomes an emergency in the middle of the night during a cold spell.

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1 Answer

1994 Carrier 58 PAV


sounds like the relay for the unit may be bad, usually if a blower motor goes it stops or has a very loud humm and only goes slow

Aug 03, 2009 | Heating & Cooling

1 Answer

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possible that the fan motor speeds have gone out.. On the cooling cycle the fan speed is set for higher speeds and heat cycle slower speeds. it is possible that the fan motor in that speed you are needing is burned out

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Fan speed setting of my Carrier furnace model 58wav091-14


most time, you don't have to do anything because the default setting for wiring with fan speed already. if not, trace the motor wires from motor with red , white and black from motor fan to PL2 and PL1. the best is look at a diagram from your actual furnace.

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