Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
The Water Cooler
General Discussion
HVAC question - am I being told correctly by contractor?
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Viper16" data-source="post: 2758647" data-attributes="member: 1558"><p>Sounds like he wants to go from a modulating expansion valve to a fixed orifice style....you will lose some efficiency in your capacities as it will not modulate based on head pressures. If the valve gets stuck and high pressure is built up, the condenser fan is trying to cool the refrigerant...if it can't then the high limit trips the whole unit off, it resets thermostatically and then tries again to turn on...it builds heat, you get that on/off/on/off cycling...very hard on the compressor. </p><p></p><p>if the compressor starter capacitors are shot (OR loose wiring can cause the trouble), then the unit would be buzzing and slamming it self on at times, and could try multiple times...I have heard a few in my neighborhood in the middle of the summer, such a nasty sound. </p><p></p><p>Could be a compound issue, with the high limit tripping and the compressor shutting off and capacitor not having enough charge time for the next start, and bam the hard start of the compressor, and the on/off cycle it produces.</p></blockquote><p></p>
[QUOTE="Viper16, post: 2758647, member: 1558"] Sounds like he wants to go from a modulating expansion valve to a fixed orifice style....you will lose some efficiency in your capacities as it will not modulate based on head pressures. If the valve gets stuck and high pressure is built up, the condenser fan is trying to cool the refrigerant...if it can't then the high limit trips the whole unit off, it resets thermostatically and then tries again to turn on...it builds heat, you get that on/off/on/off cycling...very hard on the compressor. if the compressor starter capacitors are shot (OR loose wiring can cause the trouble), then the unit would be buzzing and slamming it self on at times, and could try multiple times...I have heard a few in my neighborhood in the middle of the summer, such a nasty sound. Could be a compound issue, with the high limit tripping and the compressor shutting off and capacitor not having enough charge time for the next start, and bam the hard start of the compressor, and the on/off cycle it produces. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
The Water Cooler
General Discussion
HVAC question - am I being told correctly by contractor?
Search titles only
By:
Top
Bottom