I had the blower wheel and blower motor replaced 2 summers ago by a service tech (Lennox furnace with A/C). I didn't notice at the time but the tech replaced the five speed (five speed taps) 1/2 HP motor with a 3 speed (3 speed taps) motor.
More importantly I see the tech wired both the heat and cool lines from the controller to the black (the high speed) wire of the motor and just capped off the low and medium speed lines of the motor.
On my other furnace (with original blower) the heat line goes to the medium speed motor tap while the cool line goes to the high motor speed tap.
I am going to borrow an electronic thermometer to measure temperature rise from return to supply plenums and compare to label inside the furnace.
I guess my question is how important is getting the speed right on heat cycle? Obviously if it‚Äôs too high the air will not have as a high a temperature rise but in the grand scheme of things does this make a big difference on efficiency or comfort? I don‚Äôt know if I should consider this a major failing of the tech or just a common practice.
Cold Air Return Noise
Cold Air returns in the up stairs of my 1910 2 story...
- 15 Old House Features We Shouldn't Abandon
- 17 Tiny Bathrooms We Love
- 16 Designs for a Low-Cost DIY Coffee Table
- Insanely Easy 60-Minute Home Improvements
- 12 Sheds You Could Live (or Work) In
- Assembly Required: 15 DIY Kit Homes
- 30 Things Every Adult Should Know How to Do
- 10 Surprisingly Simple Woodworking Projects
- 7 Surprising Other Uses for Mayonnaise
- 9 Ways to Make Your TV Look at Home
- 9 Totally Amazing Mobile Home Makeovers
- 11 Lessons to Learn from AirBnB's Tiniest Homes
- 10 DIY Ways to Redo Your Wall—Without Paint
- 8 Smart Shoe Racks You Can Make Today
- 7 Easy Budget-Friendly Backyard Makeovers
- Worth It: 8 Renovations That Pay You Back
- 7 House Sounds Never to Ignore
- Watch These 10 Home Trends Take Off in 2015
- 11 Things Never to Keep in Your Bedroom
- 12 Places You Never Clean—But Should!