Frigidaire Gallery clothes Dryer model # 417GLEQ2152EE:

Luke warm - very little heat on any setting High - Low
Dryness settings just show blinking "error"
Breaker fine, vent not clogged

Naturally, out of warrantee

Suggestions?

May have a deteriorating heating element or you have lost 1/2 of the input power with a burned wire or bad breaker.