Remco pump problem little help please
This site's members have so much experience and knowledge it's hard to find anywhere that can compare!! Maybe one of you can assist me. Had a remco pump put on my wife's 04 330 AWD Lexus. Went on a 500 mile trip with no problem. Now the darn status box in the RV keeps sounding the buzzer. It does this when the cars electrical plug isn't plugged into the RV, and I understand if the pump stops working. The darn buzzer will go off about every 4 minutes for 10-20 seconds. Shuts off for 4-5 minuts then goes off again?? I called Remco tech. Guy said to wait until buzzer goes off and check to see if pump is running or not. Problem is every time in pull over to go check by the time I get back to toad buzzer has stopped. It won't do it sitting still. I finally asked the tech if the pump had any type of heat sensor in it as it seemed to happen less when I first started out in the morning. He said " oh yes that must be it as the pump will shut down at 185 degrees". The pump is mounted on same side as the exhaust coming diesel but I find it hard to believe that it is 185+ under the hood? Yesterday it was coming on and only 93 outside. If I leave cord plugged in and start the toad engine and drive the buzzer will only come on once in awhile?? Frustrating to say the least. Don't want to burn the transmission up but don't understand why the pump status buzzer keeps going off. Any of you guys ever seen this before or have any advise? All wires are tight and well installed. I think the pump might be bad even though I has less than 1000 miles on it.
Thanks in advance for any opinions guys. Traveling and not sure what to do.
Safe travels all