I installed I new guage cluster in my 88 RX-7 SE now my coolant warning buzzer goes off constantly. I put back in the old one and the buzzing stops. I have flushed the radiatopr and checked the coolant sensor both are SAT. If anyone has any Ideas Id love to hear them thanks

 

The buzzer also will go off because of low oil...

Sounds like the new cluster either has a bad solder joint, or the old cluster, has a bad buzzer

 

Thanks Mark for your input, How would I fix the newer guage if it has a bad soulder and where would thatbe located