YOU SAID:

Because my coffee was too cold I heated it in the microwave

INTO JAPANESE

コーヒーが冷たすぎたので、電子レンジで加熱しました

BACK INTO ENGLISH

The coffee was too cold so it was heated in the microwave

INTO JAPANESE

コーヒーは冷たすぎて、電子レンジで加熱された

BACK INTO ENGLISH

The coffee was too cold and heated in the microwave

INTO JAPANESE

コーヒーは冷たすぎて、電子レンジで加熱された

BACK INTO ENGLISH

The coffee was too cold and heated in the microwave