Mazda B2300 engine temperature not displaying after radiator and thermostat replacement, heater also not working on Mazda B2300

Some Mazda B2300 owners report experiencing issues with the engine temperature not displaying after replacing the radiator and thermostat, along with a non-functional heater. These problems may stem from a faulty temperature sending unit near the thermostat housing, which could have damaged wiring or a corroded connector. Additionally, if the thermostat was not replaced correctly, it can result in inaccurate temperature readings, as the engine temperature should ideally be between 190 to 200 degrees Fahrenheit for proper operation. Some owners also face challenges with air pockets in the coolant system, which can lead to heating issues; bleeding the system may be necessary to resolve this. Furthermore, the heater's malfunction could be linked to blower motor failures, blocked heater hoses, or a stuck thermostat. Lastly, if water circulation is impeded due to a collapsing hose or a malfunctioning thermostat, it can cause inaccurate temperature readings and heating problems. Addressing these potential causes can help owners troubleshoot and resolve their vehicle's issues effectively.