Lear Seigler

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Frequently Asked Questions

• What kind of technician does Lear Siegler use?

  Lear Siegler’s engineers and technicians have been thoroughly trained by our suppliers, with years of industry experience giving them the expertise required to troubleshoot and repair any environmental monitoring equipment. Contact us to find out more.

• When did LSI become part of Lear Siegler?

  After the company acquired Holland, Mich.-based Home Furnace Co. in 1967, it began selling products under the HOME Division name. In 1986, Nortek Inc. acquired LSI’s HOME Division, and began selling these products under the name of Miller Heating and Air Conditioning.

• When did Lear Siegler start making furnaces?

  Although the resulting Lear Siegler Inc. was best known for its aerospace products, it held a variety of other divisions, including HVAC. After the company acquired Holland, Mich.-based Home Furnace Co. in 1967, it began selling products under the HOME Division name.

• Who is the parent company of Lear Siegler?

  Lear Siegler sold its Miller Heating and Air Conditioning brand to Nortek and no longer produces HVAC equipment. Miller Heating and Cooling is now a subsidiary of Nortek. Nortek Global HVAC had revenue of approximately $642 million in 2017. Your email has been sent. Thank you for choosing an FurnaceCompare.com Certified Contractor.

• When did the Lear Siegler ADM 3A come out?

  The ADM-3A was an influential early video display terminal, introduced in 1976. It was manufactured by Lear Siegler and had a 12-inch screen displaying 12 or 24 lines of 80 characters. It set a new industry low single unit price of $995.

• When did the ADM-3A control code come out?

  In 1976, the ADM-3A was introduced. The ADM-3A added support for control codes to move the cursor around on the screen, and directly position the cursor at any point in the display.

• When did Lear Siegler make the first video terminal?

  In 1972, LSI manufactured the first video terminal — the 7700A. Because the new minicomputer systems required inexpensive operator consoles (compared to teletype printers), the terminals became a success. In 1973, LSI hired the new head of engineering, Jim Placak.

• Where are the DIP switches on the ADM-3A?

  The ADM-3A's overall setup was controlled by 20 DIP switches under the nameplate at the front of the machine, beside the keyboard, including speed from 75 to 19,200 baud. The advanced configuration options allowed split speed connection, sending at one rate, and receiving at another.