I recently bought a house with a Marquis 636 Everyday Hot Tub. (made around 2006, I think)
I downloaded and printed the manual, and read it carefully.
However, when turning on the power, it does not do what it should do.
First the Pr text appears on the Control panel. That is fine.
Then after 4 or so minutes, there is a rumbling, and this "--" replaces the Pr.
But the jets do not start. The manual seems to imply that they should start, and noticeably.
I made sure that the jets are open (I pressed the Jets button and then went around to make sure).
After the "--" is on for a couple minutes, it shows the temp (68) which is then replaced with 1.
After a while the temp comes back and a 2 appears.
Then it changes to 69 and a 3 appears.
This is not in the manual.
We have a service call set for tomorrow, but...is this how the tub heats up?
Is this normal?
The jet do seem to work, after you press the Jets button.