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View Full Version : Heat cuts on and off in three second intervals when on auto


coxrox2
Nov 15, 2007, 10:04 PM
Help, my heater (heat strip) cuts on and off constantly,
The fan and everything shuts down and kicks right back on,
The ac works good, but the heat will only stay on when its on fan mode..
But even then you can tell the heat strip is cutting off and on..
Thanks,
John
Nashville tn

hvac1000
Nov 16, 2007, 05:01 AM
Lack of air flow. Check and clean your air filter first.

T-Top
Nov 16, 2007, 07:42 PM
Some of the older units used a fan limit switch to bring on the blower after the heat strips have kicked on. Do you know the age and make of your system?