trey262
Dec 26, 2014, 11:21 AM
Unit doesn't heat. Is blinking three times.how do I test the end switch?
ma0641
Dec 26, 2014, 02:17 PM
"end switch"? Pressure switch perhaps? What does the flash code say?
talaniman
Dec 26, 2014, 03:11 PM
How to Troubleshoot the Goodman Furnace 3 Blinks | eHow (http://www.ehow.com/how_7909921_troubleshoot-goodman-furnace-3-blinks.html)
I can only assume you checked the vents and grills first, and wiring, and hoses.
Goodman furnace pressure switch | WebHVAC.com (http://www.webhvac.com/2010/11/diagnosing-a-goodman-furnace-pressure-switch/)
Here are a few good videos to test a pressure switch
https://www.youtube.com/watch?v=t_dsSOdPqXw
Or
https://www.youtube.com/watch?v=qQ2b-DZ82Bs