Sears Furnace Blower, off and on
#1
11-02-07, 01:40 PM
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Sears Furnace Blower, off and on
Hey guys, every summer I take of my Sears Gas Furnace. Anyways I started up my furnace yesterday, and everything worked well. But what I noticed is that the blower would come on for about 30 seconds and then shut down for about another 20 seconds. It would come on and off until the thermostat kicked off.
Any suggestions?
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#3
11-12-07, 07:08 AM
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It's a SEARS GAS-FIRED SPACE SAVER FURNACE Model #:867763270
According to a diagram on www3.sears.*om it has a (Control, Fan & Limit, part: 27055)
No i did not put my hand on the motor, should i place in while its runnin or when it stops.
What do i do if it Hot?
thanks
According to a diagram on www3.sears.*om it has a (Control, Fan & Limit, part: 27055)
No i did not put my hand on the motor, should i place in while its runnin or when it stops.
What do i do if it Hot?
thanks
#4
11-12-07, 07:20 AM
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According to a diagram on www3.sears.*om it has a (Control, Fan & Limit, part: 27055)
No i did not put my hand on the motor, should i place in while its runnin or when it stops.
What do i do if it Hot?
What do i do if it Hot?
Do you have a fan switch on your t-stat, what happens if you leave that switch to ON?
I forgot to ask you in my last post, is the burners staying on the whole time?
#6
11-12-07, 09:20 AM
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If it's doing in both mode, then sounds like the motor is on it's last leg.
Looking at the info, the furnace is an older furnace, maybe time to think of upgrading to a new high effecncy furnace.
Looking at the info, the furnace is an older furnace, maybe time to think of upgrading to a new high effecncy furnace.
#8
11-12-07, 12:27 PM
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Originally Posted by Jay11J
If it's doing in both mode, then sounds like the motor is on it's last leg.
Looking at the info, the furnace is an older furnace, maybe time to think of upgrading to a new high effecncy furnace.
Looking at the info, the furnace is an older furnace, maybe time to think of upgrading to a new high effecncy furnace.
Could it also be the fan limit switch?
#9
11-12-07, 02:05 PM
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The best way to tell is hook up voltmeter test leads to the motor and start the furnace up. If the voltage goes to 0 when the motors goes off, then it's the fan control. If the voltage remains at 120 when the motor goes off then it's the motor or motor capacitor. Like Jay said, if the motor is shutting off no matter where you set the t-stat fan switch, it's probably the motor or it's capacitor. $95 for a motor isn't that bad. Just be sure to follow the # 1 rule- always replace the capacitor when you replace a motor.
#10
11-13-07, 06:59 AM
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Okay, i went home turn on the furnace (T-Stat), blower came on and off, the MOTOR was NOT HOT.
I found my Fan/Limit Switch, i lowered the setting and the blower ran for about 25-30 min, until i turned it off.
When i returned the setting to its org. Temp Setting the blower/motor went on for 20 sec.. and off for about 20 sec. it kept cycling on and off.
I think its the Fan/Limit, I will replace it tonight when i get home.
Quick questions: There are (3) tabs on the wheel of the fan/limit, with a temp range 0 - 200. what is the best setting for the tabs?
I found my Fan/Limit Switch, i lowered the setting and the blower ran for about 25-30 min, until i turned it off.
When i returned the setting to its org. Temp Setting the blower/motor went on for 20 sec.. and off for about 20 sec. it kept cycling on and off.
I think its the Fan/Limit, I will replace it tonight when i get home.
Quick questions: There are (3) tabs on the wheel of the fan/limit, with a temp range 0 - 200. what is the best setting for the tabs?
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