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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-19-2009, 06:41 PM   #1
walt1122
 
Join Date: Aug 2007
Posts: 223
Rewards Points: 194
Default

Heat pump - Low light coming on


Hi all, it's hot outside!!!and the wife is beating me up cause I haven't had the system on so far this season. So just now I tried it and the compressor light for low pressure comes on two seconds after thermostat calls for cooling. Been a while since I used gauges and hoses. System is a 5.5 ton Hydrodelta geothermal heat pump about 10 years old. I would guess it could need some freon. I probably have a chart somewhere but if someone can direct me to a site or give me some direction on what a normal charge of R - 22 should be I would greatly appreciate it. Or if you are thinking I'm off base and it might be something else I would sure like to hear from you.

thanks

Walt

walt1122 is offline   Reply With Quote
Old 08-19-2009, 09:43 PM   #2
Member
 
Join Date: Nov 2006
Posts: 291
Rewards Points: 250
Default

Heat pump - Low light coming on


If the low pressure lockout comes on then it's trying to protect itself from running without refrigerant. (preventing bad things from happening).

If it's low on refrigerant after 10 yrs then it has a leak. You can get out all the charts, hoses, gauges, gas jugs but you also better get out the leak detector or history could repeat itself.

hennyh is offline   Reply With Quote
Old 08-20-2009, 10:26 PM   #3
walt1122
 
Join Date: Aug 2007
Posts: 223
Rewards Points: 194
Default

Heat pump - Low light coming on


Hi hennyh, Thanks for the advise. I noticed that the hi-pressure valve was covered in a damp oily film. Didn't notice anything strange anywhere else. I hooked up the manifold and added some Freon. I then looked at as many joints as I could using some bubble solution. Only place I found to have a problem was at that valve. Tiny amount of bubbles formed and only thing I could think of was to put the manifold hose on and off a couple times and then put the cap on tight. I think I either "fixed" it or there is such a tiny amount of bubbles that I don't care. Now don't get me wrong, but I'm having trouble justifying the expense of calling in an HVAC tech and have them purge, fix and refill when I have a 30 pound tank with only the amount removed that I used today. Since I have the low side safety and we know it works I think I will take my chances with having to do this once every ten years or maybe a little sooner. The valve may well be the culprit it may have been leaking from day 1 or the last time I had it professionally looked at was about 4 years ago maybe when he put his manifold hoses on the valve didn't seat properly? If so I might have 4 years or maybe more. Regardless, I'll just watch and wait. What do the rest of you think?? I may need to work on it sooner, I want to move the water lines (geothermal) so if I do that I will need to call in someone to purge the water lines of any air so I could do it all at once.

thanks for the help. Could still use some advise on how much Freon I should put in.

Walt
walt1122 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Getting a House..heatpump or no? DavidsCPU HVAC 10 02-07-2010 11:22 PM
Heat pump problem, indoor fan blows in heat but not A/C or "on" lngroller HVAC 2 06-03-2009 08:55 AM
Heat pump circuit breaker pbms pinkertonpv HVAC 11 02-18-2009 10:47 AM
Heat Pump Woes Zenica HVAC 50 01-27-2009 08:37 AM
Heat Pump + Aux Heat Problem - Can You Help? whitedavidp HVAC 17 12-25-2008 07:37 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.