Search found 87 matches

by how
Tue Jun 19, 2012 1:12 am
Forum: HVAC General Forum
Topic: Furnance/Blower Issue
Replies: 4
Views: 2140

- Furnance/Blower Issue

Dirt plugged air filter? Main or split pulley spinning on shafts? Motor spinning in the right direction? Belt still on? Dirty ac coil?
by how
Thu Jun 14, 2012 1:48 am
Forum: Residential
Topic: Problem with Luxaire furnace
Replies: 4
Views: 3006

- Problem with Luxaire furnace

Anything resticting your vent, a opened cover of a sealed combustion chamber, failing vent motor or capaciter, vent blower loose on shaft, split ends or holes on pressure tubes, water in the pressure tubes, loose wire connections to PS or safety circuit, faulty diaphram or electical switch in PS, cr...
by how
Tue May 15, 2012 11:16 am
Forum: HVAC General Forum
Topic: Lochnivar water heater
Replies: 4
Views: 2833

- Lochnivar water heater

Watch how they reset the sensor for that can end up being a real cash grab when it's eventually beyond warranty.
by how
Mon Apr 23, 2012 9:22 pm
Forum: Residential
Topic: Comfortmaker RPJ II
Replies: 11
Views: 5033

- Comfortmaker RPJ II

Even new they can be problematic so treat it carefully. The connections also have inherant weaknesses so be careful not to strain any of the connections attached to that valve.
by how
Mon Apr 23, 2012 8:58 pm
Forum: Residential
Topic: Comfortmaker RPJ II
Replies: 11
Views: 5033

- Comfortmaker RPJ II

Ahh the notorious smart valve system. Everything about that system is a potential problem from poor pin connections to a very fragile pilot proving system. If the igniter has broken off you'll need to replace the smart valve pilot assy. This is one type of system that many say is not a good DIY proj...
by how
Mon Apr 23, 2012 8:01 pm
Forum: Residential
Topic: Comfortmaker RPJ II
Replies: 11
Views: 5033

- Comfortmaker RPJ II

You probably have a board that has a led diagnostic light. The sequence of flashes it gives off can be explained on the legend that's glued to the inside of one of the furnace doors. Some times the door switch will need to be taped shut so that one can open the door to look at the led light without ...
by how
Sat Apr 07, 2012 12:47 pm
Forum: HVAC General Forum
Topic: Residential HVAC Troubleshooting
Replies: 7
Views: 2846

- Residential HVAC Troubleshooting

The duke03 advise is worth listening to. I had a bit of an engineering background when I first started so the first company I worked for put me out troubleshooting after having me accompany one of their techs around for 5 days. I was proud to be doing this and the money was good but what I didn't re...
by how
Wed Apr 04, 2012 7:52 pm
Forum: Residential
Topic: New Furnace Used During Construction Process
Replies: 4
Views: 1801

- New Furnace Used During Construction Process

Why?..... has the contracter been running the furnace in a construction zone without a filter? Once the house is finished and the furnace system is cleaned up, I doubt that anyone is going to know what kind of dust abuse it went through so...I sincerely doubt that you'll ever have a refusal of warre...
by how
Tue Apr 03, 2012 1:18 pm
Forum: HVAC General Forum
Topic: Furnace start up question
Replies: 3
Views: 1755

- Furnace start up question

There is a natural sequence of events that occur in a furnace heating cycle. The start of the inducer motor, the proving of it through a pressure switch, the start up of the igniter, the opening of the gas valve, the confirmation of that flame, the start up of the main blower. etc. The two things wi...
by how
Sat Mar 31, 2012 7:40 pm
Forum: Residential
Topic: Fan keeps running, no heat
Replies: 16
Views: 4638

- Fan keeps running, no heat

Fans keep running on because they are wired that way, the stat has been switched from auto to "on", the "G" stat wire has been powered by a short or crossed stat wire, anything causing an opening on the safety limit circuit, (on some furnaces, tripped roll out switches) and frozen fan blower relays ...