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Problem: Blower shuts off too soon, cycles off and comes back on within 30 seconds

Problem: Blower shuts off too soon, cycles off and comes back on within 30 seconds to a minute, or runs too long and will not shut off until it is blowing cold air

Solution:  You could turn you electrical power off and adjust the little tabs on your fan limit control. You can sometimes adjust the little tabs on your fan limit control to make in run longer or shorter. The fan “OFF” setting on the fan control below is set to go off at 90 degrees. On at about 110 degrees and the limit that shuts the gas burners off is set at 190 degrees. You can lightly push in on these tabs and adjust them to the desired temperature. I always lightly push and hold the center round dial while adjusting the tabs so it will not bend or break the limit control spring that is attached to the dial and runs in back of the limit control. Please see the picture below. If your adjustments do not work, or if your fan limit control becomes too inaccurate then you might consider purchasing one of the Honeywell fan limit controls we sell below. We sell fan and blower controls on the following page: Please click here if you would like to see the blower controls that we sell. Please email us anytime if you have a question. Our email address is: support@arnoldservice.com We would love to try and help you out and have your business!

Honeywell Fan Limit Control Out of Box

2 thoughts on “Problem: Blower shuts off too soon, cycles off and comes back on within 30 seconds

  1. Hello, my Furnance blinks 4xs saying it’s my high limit. I ohm out the limit and it read good! It kept saying I had an open winding in my circuit, could it be that once the heater cools down the high limit closes or I really have a bad high limit even though it reads good.

    1. Hi Mr. Hall! If your furnace is going off on high limit then this means your furnace is over-heating by not getting enough air through the heat exchanger. When the furnace cools down the limit should cool also and the circuit should close again until the furnace over-heats. Over-heating can be caused by a dirty air filter, a dirty blower wheel, dirty or stopped up evaporator coil or a slow blower motor (might need a new blower motor capacitor). We discuss this problem on the following page: https://arnoldservice.com/problem-furnace-comes-doesnt-run-long-shuts-off-will-work-thermostat-turned-way/ I hope you can find out what is causing your furnace to over-heat. Steve

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