As others have mentioned, the transformer is burning up because the load on it is too great. This is likely caused by a damaged component within the control circuit, which is drawing far too much current for the transformer.
Why does my transformer keep blowing?
A transformer can fail for a variety of reasons, but the most common causes include lightning strikes, overloading, wear and corrosion, power surges and moisture. Regardless of the cause, the result can be remarkable. Transformers contain mineral oil keeping the transformer cool.
How can you tell if a transformer is bad on a furnace?
Symptoms That Your Transformer is Under the Weather
- Your Heater Won’t Work. You wake up on a cold Minneapolis morning, peel yourself out of your warm bed, and head over to your home’s thermostat. …
- Your Circuit Breaker Trips. …
- Your System Hums and/or Vibrates.
What causes low voltage transformer failure?
Low-voltage transformers do not wear out. A technician should troubleshoot the transformer and find the reason it failed before replacing it. Usually, a transformer fails only after another part in the electrical circuit shorts to ground or draws an unusually high amperage.
What does furnace transformer do?
The basic function of the furnace transformer is to supply power to the furnace itself. This can lower the high voltage capacity to a lower voltage output. This is required for Arc furnace operations. You will find that some furnaces need 24 volts to operate.
How much does it cost to replace a transformer in a furnace?
$100 to $175
Replacing a transformer in a furnace costs $100 to $175. The part alone only runs $20 to $40 with labor making up the rest. The transformer converts incoming electrical power into lower usable volts.
How much is a transformer for a furnace?
Transformer. Your furnace’s transformer gives it the power it needs to run. The average cost to repair or replace a transformer is $100–$175.
Should furnace transformer be hot?
Yes, transformer primaries use electricity (and therefore get warm) even when there is no load on the secondary winding. It’s usually just 5-10 watts, and that’ll be hot to the touch depending on how much thermal mass it has and airflow around it.
How can you tell if a transformer is defective?
To test your transformer, simply touch the red and black pins of your ohmmeter to the opposite ends of the transformer’s wiring. Read the display and compare the resistance on your ohmmeter to the resistance stated on the transformer’s data sheet.
How do you fix a transformer?
Quote from the video:
Quote from Youtube video: The first step after removing the transformer from the power supply was to remove the core laminations. This is a shell type core with eliminations.
How long does it take to put in a new transformer?
The average time to fix a transformer is between one hour to several hours. But, if there is severe or widespread damage, it can be up to several days or longer.
Are furnace transformers universal?
Product Description. This transformer is a universal replacement for many gas and electric furnace models. The two foot mounting holes are spaced 3-1/8″ on center.
How do you replace a furnace transformer?
Quote from the video:
Quote from Youtube video: Now remove the screws securing the transformer to the mounting plate. And pull the old transformer off install the new transformer by aligning it on the mounting plate.
How much does a transformer cost?
Power pole transformers cost anywhere from $3,000 to $7,000 each, depending on how much electricity they’re designed to handle. The money comes from utility customers. PG&E has almost 990,000 distribution transformers above or below ground throughout its system.
How long do HVAC transformers last?
According to the ANSI Standard C57. 12.96, the life expectancy of a low voltage dry type distribution transformer can be 20 to 30 years or even longer under various loading conditions.
Why do transformers smoke?
If you hook a step-down transformer up backwards, it becomes a step-up transformer. So if you were putting 120 volts in the low side, 1200 volts would theoretically come out the high side. The low side probably has wiring that is too small to handle 120 volts, and would heat up and smoke.
How much is a transformer for HVAC system?
It costs between $100 and $175 to replace a transformer in a furnace. The labor makes up the rest of the part’s price. The transformer is used to convert incoming electrical power to usable volts.
