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Turned the a/c on for the first time sunday and all ran well. Tried to turn it back on Mon. and the fan will not start talking about the fan to the squirrel cage. Getting nothing, turned it back to heat on the front of the furnace and fan wont come on then either. Tried to get the fan to run using the fan auto and on switch on the front of the furnace and nothing. Any ideas?
The whole unit outside and inside will not kick on. Will be glad to give more details as needed!!
Also check for 24 volts at the transformer. If you have 24 volts there you might check the low voltage wiring. It sounds like the A/C fan relay might be bad.
One last thing. There is a high limit control in the furnace that has a red push button. Turn off the power and push the red button in the center of the control. Usually this control only works the furnace but I have seen them shut off the 24 volts to the controls.
God, grant me the serenity
to accept the things I cannot change;
the courage to change the things I can;
and the wisdom to know the difference.
here are some pics of furnace if it will help diagnose the problem, have went to a few hvac supply houses here and none of them have parts for this furnace.
thanks robert found the transformer, it is in the lower box, along with the fan switch and lower limit.
Checked and got 28 vac to lo side, and 123 vac on high side of transformer. checked fan switch and got 122 vac at fan switch, and showing 0 vac at the lower limit.
I greatly appreciate all of the help!!! Sorry it took so long to get back to u guys about this, have been helping friends and family move their belongings. Sitting here in st. joe, mo waiting for the mighty missouri to crest over its banks, looking to flood here. Sucks!!!
I also turned off power to the unit, and checked continuity at the switches using ohms setting on multimeter. at the lo limit it zero's out, the fan switch shows a reading of 0.001 to 0.007, the lo side and hi side of transformer also zero out.