These are the possible cause of the Power supply problems
Suggestion: You connected Positive and negative pole wrongly and caused short circuit, need to check the wiring
Suggestion: You need to change a new power supply。
Suggestion:Check the power supply, fan, heating rods, make sure they are all with 24V, if the fan and heating rods are with 12V, then you need to change these parts, if they are 24V, then you need to change the power supply.
Suggestion: You need to replace the power supply