The best replacement for no thermostat is no thermostat.

The best alternatives to no thermostat are rated as following:
★★★★★  no thermostat
★★  thermistor

Your alternative for no thermostat is not listed? Suggest!
Speaking about no thermostat, one probably shouldn't forget about electric water pump.

Other search terms related to no thermostat and their ratings are:
★★★★★ electric water pump
You have in mind a companion for no thermostat and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of no thermostat in all years. Click on graph for more.
no thermostat
no thermostat
thermistor