Coolant Alarm Won't go off
 

My coolant alarm will not stop buzzing even though there is ample coolant, tried to disconnect the wire to the guage cluster but that eliminates tach, speedo, etc. so not an option, does anyone know of another way to fix this? or stop the noise? any advice is welcome. Thanks,

Probably a bad sensor, did u try and change the coolant? If that doesnt work just take it to autozone or advance auto and have them take a look at it.

Low coolant alarm
 

My coolant alarm keeps going off. Once my 1990 RX-7 gets warmed up, it begins; first intermittently; then after 15 minutes of driving, it stays on. I searched thru several MAZDA discussion sites and the first thing recommended was to change the thermostat. That did not solve the problem.

I sent the car to the local Mazda expert, Advanced Racing Technologies. They had the car for three days and checked everything, flushed the system, tightened belts and checked the water pump. The tech took the car for a ½ hour drive and said the alarm never sounded. Within 5 minutes of me taking the car, the alarm was sounding. I searched the Mazda discussion sites again and it was suggested to ground the alarm wire to shut it off. That worked. It stopped the alarm, which to me reveals that the wiring from the sensor to the alarm was good. Has to be the SENSOR. I bought a NEW OEM sensor from the local Mazda dealer. It did not solve the problem.

I need help on this one. The car is in wonderful condition but the alarm drives me nuts.
If someone knows what the next step is, please email me @ [email protected]
Thanks

I cannot believe with all these Mazda owners on this site, that no one has an answer to this problem.

It's highly probable that your coolant is is seeping out from somewhere or the sensor is bad. I doubt the latter. Do you smell coolant inside the car? Ck and see inlet and outlet on a firewall is ok. Also carefully look at around the neck of t-stat (mostly back of it...)

And, if you don't have any seepage anywhere whatsoever you may have air in the cooling system.