Does anyone know if the engine preheat is a stand alone loop or is it teed into the dash heating supply/return hoses? THANKS!!!!
Hi Bob, Google Aquahot with the model number and look at the set up. Mine looks like it is a stand along system. If you turn the engine heat switch on the AQ will heat the engine, do not run the engine with the switch on, this will damage the AQ. Also when driving down the road the engine will heat the water in the AQ.
Ben 1999 u320