What you have now is fine, there is no need to take anything back. What you need to do, is to buy a thermostat to ADD onto what you already have, so it can control the emitter.
A bit more info on thermostats:
https://www.hedgehogcentral.com/forum...rmostat#p11005
There are pictures of what everything is in your other post I had written, with the quote and links.