nodemcu relay blowing up,fix this issue now

Budget:20$,1-2 hr job Need expertise who can provide solution and fix this issue asap. 1)Using nodemcu 2relay LM2596(step down 36v(battery) to 5v,powering nodemcu and relay from 36v battery ) to control battery power to motor on/off. 2)this code calls API every 10 seconds,connects to wifi hotspot and do not know it heats up and does not work anymore ,need to fix this issue and make it run 24x7 ,365 days . Everything works fine for few hrs but suddenly nodemcu and relay will not work anymore,do not know if nodemcu and relay are not so good or problem with code . This is quick job for expertise.