I hate to say it, but the"temporary fixes" may have ended up disguising your problem (s). So first thing first, what is your HWH system model? Do you have the long or short control box? Go thump the HWH site and down load the manual for your system and control box if you haven't done so. Look for a troubleshooting pub for your control box. Physical things you can do is make sure all your solenoid valve bypass (pressure relief) screws are turned back in. Can you get the pump to pull in any slides? By that, I mean can you hear a change in the sound of the pump when the slides are retracted, and you continue to bring them in? Don't burn the motor out, just 10 seconds or so should sound different. This means that the pump is putting pressure on the slides. If this doesn't happen, then you need to measure the pump output pressure. Instructions for that are on the HWH website. You might also look at the LEDs on the control box, have your DF or a friend press the various buttons on the control pad and verify that all the proper LEDs light up. You can of course do any of those steps in any order. But those are a few things to keep you busy.
Jim and Valerie, 2005 Winnie Adventurer 37B, 2014 Subaru Forester Toad, hitches, brakes, anti-sways, autopilot, gourmet food on a Social Security budget.
"Wave as you go by."