Compressor Wont Kick Back In - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 08-20-2009, 05:16 PM   #1
Newbie
 
Join Date: Aug 2009
Posts: 2
Rewards Points: 10
Question

compressor wont kick back in


I am having a problem with a friend of mine's A/C unit. It has a 17degree temp split but the compressor drops out now & then & wont come back on for a long time. My gauges show that the pressures are not equalizing after it kicks out, to allow the pressure switch to let the compressor restart. There is an expansion valve on the system. She tells me that the entire system was just replaced about 2yrs. ago. Any suggestions??? Its hot here in Houston & she is an elderly woman.

Advertisement

apegasus4u is offline   Reply With Quote
Old 08-21-2009, 05:26 AM   #2
Member
 
Join Date: Mar 2009
Location: Pennsylvania
Posts: 719
Rewards Points: 500
Default

Low pressure problem


Sounds like something is wrong with the pressures in the system, the low pressure cut off should not be holding the compressor out it is in the safety circuit to shut down for low pressure only not to cycle the unit.

On some pump down systems it is used to start and stop units with a positive shutoff solenoid, mostly commercial and industrial systems with receiving tanks.

Advertisement

SULTINI is offline   Reply With Quote
Old 10-07-2015, 09:20 PM   #3
Member
 
Join Date: May 2014
Posts: 167
Rewards Points: 225
Default


What type of compressor is it scroll or recip.? how long does it take for the system to equalize? Recips usually need a hard start capacitor to start
a.man1302 is offline   Reply With Quote
Old 10-07-2015, 11:39 PM   #4
Member
 
Join Date: Nov 2014
Location: Canada
Posts: 2,548
Rewards Points: 5,100
Default


Does the compressor shut off while the fan continues to run, or does the entire unit shut down while there's still a call for cooling?

The pressure cutouts will shut the entire machine, wheres if it's just the compressor, you have an overheating issue.

If it's just the compressor cutting out, check:

1. The run capacitor, this could be going bad but still allow the compressor to start up. the capacitor impact motor operation, not just starting.

2. Compressor amperage draw

3. The outdoor coil - could be plugged with lint. (this will also trigger a high pressure cutout to shut the machine there)

I guess if it's the pressure cutout, you have to figure out why. Maybe see if it's the high or low (if applicable, it may only have high or low pressure) Could be a txv issue, could be a charge issue, could be many things.

Would need to monitor operating pressures, line temps as well, what the pressures are when it cuts out.

If this is a heatpump try running it in heating mode (with most of the outdoor coil covered if it's very warm) -> that could bypass the indoor tx valve (there's a check bypass valve, the indoor tx valve only does anything in cool mode) to see if it still trips out.

Last edited by user_12345a; 10-07-2015 at 11:49 PM.
user_12345a is online now   Reply With Quote
Old 10-08-2015, 03:51 AM   #5
Member
 
Join Date: Nov 2011
Location: Md/Pa
Posts: 2,441
Rewards Points: 3,246
Default



.....
zappa is offline   Reply With Quote
Old 10-08-2015, 05:27 AM   #6
An old Tradesmen
 
Join Date: Oct 2008
Location: Somewhere
Posts: 32,653
Rewards Points: 6,686
Default


Hope he got it fixed or replaced in the 6 years since he started this thread.

Advertisement

__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is online now   Reply With Quote
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
mitre saw kick back rcm572 Tools 2 02-04-2009 07:46 AM
Heat Pump set back GEAF HVAC 6 01-26-2009 07:49 AM
Trends in 2009: POPCORN TEXTURE IS BACK! studiobarb Interior Decorating 11 09-02-2008 06:26 PM
central air wont kick in? What have I done HVAC 3 08-14-2006 02:03 PM
Sloping Floor and back half of the house. Help! mikeinfrisco Building & Construction 1 01-22-2005 08:50 AM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1