Arrived onsite to customer not having heat. Customer approved diagnostic pricing on 40 year old electric furnaces. Through diagnostic process found that sequencer relay is no longer working on middle bank of strip heat. Customer still has 66% of heating capacity. Presented pricing for all of furnaces replacement as they are all the same size and style and age. Customer wanted to move forward with repair at this time. Informed customer there would be no warranty on any work performed due to age and condition of units. Arrived onsite 11-21-22 and provided and installed a new sequencer relay. Tested installation and found outlet air was 112.2 and return air was approximately 72 indicating a 40 degree split. Each bank of strip heat had 20.2 +/- .1 amps indicating each bank is operating at this time. Thank you for choosing CPI plumbing and heating!