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Topic: Small Compressor (Thomas) won't come on - HELP (Read 340 times) previous topic - next topic

Small Compressor (Thomas) won't come on - HELP

Foretravel Family...

Here's what has happened... Showed up to coach after a few days away to load up to head to a 3 day lake R&R.  When I got to coach I heard the compressor running so I went right away to check on it while it's running and not timed out. I opened the bay door to what felt like an oven. The compressor was really hot, could barely touch it. I immediately pulled the inline fuse to shut it off.
Next I grabbed my soapy water bottle and went to spraying around fittings, In doing so I found the pressure switch leaking badly. So, I run to town and grab another and replaced the bad one. Got it replaced and fired up.. it ran till it timed out and shut off (120psi).. GREAT!

Loaded up, headed to campsite... long story short.. I haven't heard it run again...  Here's what I've checked so far: Checked my 10amp inline fuse (good); Checked all connections (by this I mean what looked like to me inline glass type fuse holders were plugged in connections); I have 13v at terminals where feed is picked up;

Looking for advise on what else to look for or what to replace first. (circuit board?)

This is my second post on forum, (as ya'll can probably tell), hope this message gets out.
Thanks in advance for any feed back.

Mitchell & Sandra
2010 Foretravel Nimbus 45'

Re: Small Compressor (Thomas) won't come on - HELP

Reply #1 –
Not 100% sure for a 2010, but the earlier coaches have a resettable 12V breaker (something around 30-40 amps) behind a panel in the basement.  One of them is for the aux compressor.  I'll try to find a post with a photo.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Small Compressor (Thomas) won't come on - HELP

Reply #2 –
Thanks Michelle... BUT... got an update!!!!

I went to the NEW pressure switch with a small screwdriver and forced the contacts together... it RUNS.... so, no power issue.
The pressure switch I replaced the old one with has a lever to SHUT OFF or put in AUTO.... (I had it in auto, but obiously it does'nt like it.. I'm going to try and find an exact same type.. unless someone tells me differently...

Thanks for checking for me... don't bother though, it doesn't appear to be a power issue.

Re: Small Compressor (Thomas) won't come on - HELP

Reply #3 –
Do you have a pressure gauge in the system? Maybe it isn't needed? Once the rig is level and slide rooms set the compressor should not need to run. Only leaks or the suspension adjusting should cause it run. On some coaches the suspension overrides the pressure switch so only leakage or the slide room seals are requiring make up air.
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148
 

Re: Small Compressor (Thomas) won't come on - HELP

Reply #4 –
Quote from: SanMitch –
got an update!!!!

I went to the NEW pressure switch with a small screwdriver and forced the contacts together... it RUNS.... so, no power issue.
The pressure switch I replaced the old one with has a lever to SHUT OFF or put in AUTO.... (I had it in auto, but obiously it does'nt like it.. I'm going to try and find an exact same type.. unless someone tells me differently...

That jogged my memory that the Square D pressure switches do come in different flavors.  Some discussion in this topic

Pressure Switch and coach leveling

ETA see also

Thomas Compressor puzzled part

Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320