MTH 30-9104 Speedee Car Wash Help- All Good Now

It sure sounds like something is stuck. Very basic system inside. When conditions get met, the car moves to the next point.

I bought one that was broken. I had to dismantle it, sand and lubricate the main wheel to get it to spin freely. It kept getting stuck.

All the switches inside worked great. Every once in a while it goes around silent, when power is applied. I believe it's from something out of sync. I also believe that what you're seeing!

Thanks so much for the input; do not relish removing the back and making sure the all wheels stay in place.  Will go through all the micro switches and check continuity; thanks again for the info. Falcon70

The limit switches don’t like to open/close/open and so on during the cycle.  I learned that on my gas station.  Somehow I think the board or program switch gets confused.  That really is the only input/output.  You might apply jumpers after you take it apart.  I recommend ordering switches prior, as they a not to expensive and will work on other MTH stuff of that ilk.  Just my thoughts.

I suspected the switches; will order some more and go from there; I agree on the O/C/O sequence may be an issue; thanks much; Falcon70

As to the smoke: I had one of the original runs, and found that the smoke tube nozzles were not quite open enough to allow the smoke to come through. I used a small wire (a paperclip, in fact) to poke into the nozzles and clear them. Plenty of smoke after that. Hope this will help.

I should take mine back apart and take notes. I believe things  like the door not being fully open or closed for example, will stop it from operating correctly.

Recently my smoke unit stopped working. So I need to look at that again.

Engineer, would really appreciate any tips you come up with; took off the bottom cover and seeing the mechanics turned my bowels to water!  I  think the five micro switches feed the board and it in turn controls the other “stuff”.  Thanks again; Falcon70

I didn't know these had a smoke unit? 

Rod Stewart posted:

I didn't know these had a smoke unit? 

Pull the chimney cap off, 20 drops.  I think, and you better hope the switch is turned off.  It simulate the spray of the water.  You are missing the viola moment without it.

Got it workng now; "stupid is as stupid does" in the that I was holding the activation circuit closed; it is a MOMENTARY activation!  Duh!  Smoke unit was belly up; motor ran but no air flow.  Found some white silicone sealer between smoke PCB and impeller housing; stopped fan rotation; cleaned the residue from bottom of PCB and replaced the impeller; smokes like crazy now on the wash cycle.  Thanks for the idea the control board needs time to process the micro switch inputs; good to go; Falcon70