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Except for units that use a txv in the od unit. After the first few years of servicing only bryant equip. the company I was working for started also dealing lennox. I noticed the abscence of...

liquid line strainer just before metering device could be blocked, should be freezing or have a temp diff. at restriction

sounds like a lot of guessing until someone comes out. can't believe they wont be back until next week

yep, better just bite the bullet and let the tech try one thing at a time.

Keep looking for a contractor. would never use flex unless sleved with rigid pipe. What are they going to with heat tape on the condensate line and then let the trap freeze? I know that they make a...

I vote 3tons or is it 36,000 btu?

Would be better to get these systems in during construction in my opinion for the simple fact that it can be scheduled and completed during the normal constuction cycle. You know before flooring is...

Would change evap and mtering device. R410A metering devices are about 15% smaller than on r22. Also How much Oil will be left in the r22evap? The question is how much wax will be in that oil to clog...

Agree with beenthere. also would have electrician check furnace, o.d. unit wiring.

sounds like liquid may be migrating through system, is condenser coil clean, ran into this once and the s/a's were all closed

should not have to add oil

Agree with Crazy4. As for the txv I would try to manipulate it with hot water soaked rag or glass off ice water.

Yes can be done, in fact I use that application in my house. Just remember that the HP operation will supply lower temps than your fossil fuel system. The contractor that you decide to use should be...

Something to think about. The new ahu will be matched to the od unit, and have a new blower motor instead of a 26 year old one (if not already replaced).

Generally the reversing valve energizes when the tstat is placed in "cool" and de-energizes when switched off of cool. This can be the opposite way in some systems but it is interesting that until...

As stated in the prev. posts there is really no actions that you can take except for waiting for the tech to arrive. I can explain a little about what is happening though.
The fast blinking light is...

I have found that in addition to pressure checking the system the use of an electronic leak detector saves me and the customer time and money. Yes I had to buy it myself. No I don't cry about it to...

The metering device used in a 410a system is about 15% smaller in capacity as opposed to a metering device used in a R22 system of the same capacity. Only a metering device designed for 410a should...