www.hvactechgroup.com - forums

Hi guys,

I put this together as a free 120-page refrigerant tracking logbook for fellow HVAC/Refrigeration technicians, contractors and service companies.

It covers refrigerant charging, recovery, leak repairs, service records and technician notes, with space to keep equipment and service history organised.

It's free to download, but I've left it as pay-what-you-want for anyone who wants to support it.

Thought I'd share it here in case it's useful to anyone.

Download here:
https://greenergy85.gumroad.com/l/refrigeration-hvac-refrigerant-logbook


Cheers,
Alan.

Hello I'm 23 and I plan to take the G2 exam with challenge, both written and with supervised scenario applying practical knowledge.  Anyone in Ottawa with a G1 or G2 who can tutor me once a week for a few months?  I have a sponsor who will pay for the tutoring.

Ok my furnace has two filters at the base of the unit, one on each side. I want to remove them and put the filter in the return air grille. I live in a very dusty area and the return air duct work gets so dirty every year and I am tired of having to spend several hours to clean it up. I have seen other systems that had the filter in the return grille instead of at the furnace.
So my return air grill is a 25x25 unit and what I am wondering if by moving the filter to the grille if I need to change the size of the return air for some reason I am not aware of. I tried to do the figuring for needed return air size for my unit but am not figuring it out.
Here are some details
Current filters are (1) 20x25x1 on one side of the furnace and 20x20x1 on the other.
Current return air grille 25x25
Furnace is a Lennox
Model # CB19-51-3p-TXV
Serial # 5895F61762



Any help would be greatly appreciated.

Put it on Fan On.  Your heating and cooling with still work as normal.

I have Carrier HVAC system, model 58CVA/CVX. It has an Infinity thermostat, model SYSTXCCITC01-A.  I want the fan to run continuously while in Auto or Heat or Cool mode. The thermostatfan selection speed does not present the continous run as an option except in Fan only.  Does anyone know how I can get the fan to run 24 hrs a day for better air circulation.  Thanks....

I'm replacing central AC. My new evaporator coil is little higher than the old one, and now the new one is blocking two flare takeoffs by 50 square inch, one takeoff duct is transfer 14x12 (168) to 14x10  and other 18x12 (216) to 18x10. Do I have to alter the takeoff for those 50sq inch or it will not affect the airflow?   

I run a small HVAC-only job board (findhvacjobs.com) and part of maintaining it is reading a lot of listings. Two patterns jumped out after going through about 6,000 active postings that I figured this group might find interesting:

Way more employers bring up your driving record than your EPA card. Makes sense once you think about it — the insurance carrier decides who drives the van, and a bad MVR takes years to fix while a shop can send you to sit the Universal in a weekend. But I didn't expect the gap to be that big.
The "entry-level jobs that secretly require 5 years" thing is mostly a myth. I went looking for it and found hard experience requirements in only about 1 of every 12 apprentice/helper listings.

The board itself leans entry-level (apprentice/helper) since that's who the big boards serve worst. If anyone here hires: curious what would actually make a niche board useful to you versus just posting on Indeed.

And for the techs — what do the big boards get wrong that a trade-specific one should fix?

Thanks for the quick reply. I'll check the warranty.

You could turn the breakers off to the outdoor unit and if you still hear the buzzing then it's likely the 24V contactor coil.

I'm surprised the technician came to look at this problem and didn't go to the outdoor unit or take that control panel cover off.

First I would identify if the noise is coming from the outdoor unit or the indoor unit.

If you registered the air conditioner you should have a 10 year warranty on parts.

I couldn't upload my own recording, but found this one below on Youtube, it's the exact same buzz. So it seems to be the contactor but we hear it right at the ductwork at the AC unit in the basement. Unfortunately we didn't go outside to the condenser when the noise occurred.

https://www.youtube.com/watch?v=FilZHf5EpPE&t=13s