A tripped circuit can prevent your dryer from heating, causing a range of symptoms including reduced or no heat output. To identify if a tripped circuit is the issue, check your home's main electrical panel to see if any of the breakers have tripped. If you find that a breaker has indeed tripped, reset it and then try running your dryer again. However, if multiple breakers are tripping or if none are working, it may indicate a more serious electrical issue that requires professional attention. To diagnose the problem, check your dryer's thermal cutoff switch for signs of overheating, and ensure that the venting system is clear of debris and blockages. If you're still unsure about how to proceed, consider consulting a licensed electrician for assistance.