How do I test if the dryer is heating properly after installation?

Select a Timed Dry heated cycle and start the dryer — do not select the Air Only temperature setting. After the dryer has been running for 5 minutes, open the dryer door and feel for heat. If you do not feel heat, turn off the dryer and check that the gas supply line shutoff valve is open; if the valve is already open, contact a qualified technician. (Page 17)