sunhome model 8911 heater not working
sunhome model 8911 heater not working just cold air comes out
how open it was unable to already remove screws
Have you checked that the “cold shot button” is not stuck down at all?
If it is OK then you may have to open the dryer and check with an Ohmmeter that the heater element circuit is OK.
Disconnect the dryer from the power and once you have opened the dryer, test from the power cord plug, through the temperature control switch and cold shot button to the heater etc.
If the heater element is faulty it may be difficult to get a replacement part as sometimes there are no spare parts available for these kinds of electrical appliances. If the temperature switch is faulty, search on places such as mouser.com or digikey.com to hopefully find a compatible replacement switch.
If you don’t know how to test electrical appliances then contact a reputable appliance repair service. Although given the cost of the dryer it may be cheaper just to buy a new one.