Comments on: HVAC Triple Evacuation

By: DrZarkloff

DrZarkloff — Tue, 19 Jan 2010 07:40:07 +0000

Acid in the system will eat away the insulation on the electrical windings in the compressor.

By: DrZarkloff

DrZarkloff — Tue, 19 Jan 2010 07:10:46 +0000

A low head pressure isn’t an indication of acid in the system. You really need to test the system oil with an acid test kit. It’s an inexpensive test.

By: bobbyton80

bobbyton80 — Tue, 19 Jan 2010 06:59:57 +0000

thanks

By: leshoffman1

leshoffman1 — Tue, 19 Jan 2010 06:02:54 +0000

a low head pressure can cause acid to build up in a system but not an indication that acid is in the system. Acid forms from heat which breaks down the oil low head pressure can cause heat which over time breaks down the oil and forms acid in the system. Hope this helps with your knowledge and your question.

By: leshoffman1

leshoffman1 — Tue, 19 Jan 2010 05:56:01 +0000

Why is this rated as a poor comment?

By: mikeanajulie

mikeanajulie — Tue, 19 Jan 2010 05:10:11 +0000

dr my evaporter coil is freezin up becuse my blower dont turn on, what should i be looking at. sometime it will kick in if i turn off the fuse and turn it back on.

By: DrZarkloff

DrZarkloff — Tue, 19 Jan 2010 04:56:56 +0000

Make sure that you are getting the right voltage to the unit. The breaker could be going bad. Otherwise, the problem will be either a bad blower relay or a bad run capacitor or a bad blower motor.

By: mikeanajulie

mikeanajulie — Tue, 19 Jan 2010 04:51:43 +0000

oh and dr.z there was water on the emergency driain pan under the evap coils, so i cleaned it ,and put water in the drain pan [pan was dry as hell], then it start working again, will the blower not run if there no draining going on

By: DrZarkloff

DrZarkloff — Tue, 19 Jan 2010 04:02:59 +0000

The entire system could shut down if you have a condensate overflow. That’s providing you have an emergency shut off connected to the control voltage.

By: leshoffman1

leshoffman1 — Tue, 19 Jan 2010 03:24:44 +0000

I didn’t say a low head was an an indication of acid in the system but over time do to high heat can cause acid to form in the system. I tatally agree an acid test kit is the only way to be positive as to whether acid is in the system or not..