I just purchased my first 3d printer. I am having some problems with the heating elements. The bed doesnt seem to get above 72C. Its a tronxy p802m . Anyone seen this problem?

Tronxy P802M is almost identical to Anet A8. I will check the bed connector first, I have a faulty one that could easily caused fire. For all the attempts to get to 90C, I put an insulation layer under the bed and bought all the components to upgrade to 24v. After consideration of fire hazard and power consumption, I decided to go a different route. I installed a cheap glass bed from a local hardware store and bought a dozen of glue sticks. Now I got very reliable result without heating the bed every time, even with ABS.