About 1 year ago i was traveling home and my 99 Honda Civic started over heating (getting close to red). I was no where near home and it was 1 AM in the morning. I pulled over and checked my coolant. All of my coolant went into my reserve tank so i blasted the heat in the car to cool it down then drove as slow as possible home. The problem just kind of went away the next day. So yesterday (a year later) i was driving to and from the san diego airport (about 65 miles round trip) and my car started to do the same thing except when i went to turn on the heat in my car to cool it down, no heat came out. Only cold outside air. Im not sure where to start as its not throwing a check engine light and it only happens when i travel long distance.

- All the coolant goes into the reserve tank
- No heat from the heater

Any advice would be great.

Thanks,
Ryan