Reply
 
Thread Tools Display Modes
Old 07-27-2019, 04:52 PM   #1
Junior Member
 
Join Date: Jul 2019
Posts: 1
Coleman-Mach AC Blower Problem- Help!

Hello! I just bought a brand new Coleman Mach ac unit for my fifth wheel which previously had a Carrier Air V in it. I used the Carrier to Coleman conversion kit because I am keeping the carrier faceplate because it has a built in thermostat and controls my furnace as well, all via remote. Well, everything has been working fine for about 9 months...until last week.

When my air conditioner kicks on, you can hear a click meaning that the AC is kicking on in auto mode but the blower fan will not turn on. (Typically, the fan will start blowing and then about a minute later the compressor kicks on.) Not sure what the problem is. All maintenance has been done and its not the wiring because it has been working just fine for just 3 months short of a year. Now, even in low mode (continuous fan with AC) the fan will shut off by itself and the compressor will still be running, though the fan should run until I turn the unit off.

THinking maybe my control board might be bad. Any ideas? Thanks!
__________________

JoshTab17 is offline   Reply With Quote
Old 07-27-2019, 05:12 PM   #2
Senior Member
 
Bluepill's Avatar
 
Join Date: Jun 2015
Location: Pensacola, FL
Posts: 1,574
1. Find a wiring diagram either online or inside the A/C unit.

2. See if there is one wire for fan control and another for compressor running between the thermostat and the A/C. If so, monitor the voltage on the fan control line to see if it is the thermostat that is failing to supply the control signal.

Note: if you have a digital thermostat, it probably only sends data signals and you would have to monitor the relay control inputs at the control board.

Searching online sometimes finds the factory service manual that gives step-by-step troubleshooting. info.
__________________

__________________
2019 Coachmen Freedom Express 192RBS
2015 T12RBST Flagstaff Hardside

Disclaimer: The actual value of my "Two Cents" of advice varies just like a bitcoin.
Bluepill is offline   Reply With Quote
Old 08-06-2019, 12:41 AM   #3
Member
 
Join Date: Mar 2017
Posts: 40
If the compressor kicks on, and the fan runs in low mode, that rules out the tstat and (most of) the control board.


Without knowing what tstat you have, you can try to run the fan only on high and low. If it doesn't run on high, but it runs on low, that sounds like a capacitor issue.



DO NOT mess around with the capacitors without doing some research. If the caps are working fine and are fully charged, just touching the contacts will hurt you.
email is offline   Reply With Quote
Reply

Tags
coleman

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:04 AM.


×