Company
Services

Transformer keeps going out on a 24B  AC-unit-furnace Carrier 48XPN.

24.08.2016

Transformer keeps going out on a 24B  AC untit/furnace Carrier 48XPN. Client calls Sunny Appliance Repair to have a tech come and take a look at his AC unit. When the technician got there he ask to point him toward the unit, thats when he discovered it was located on the roof. He client gladly provided a latter. Once up there he was able to see a big furnace/AC unit(2 in 1) Carrier48XPN. Technician opened the lid to inspect, first he checked that there was power going to contact 240B. He did that to insure everything is ok with the safety switches. Next he star examining the control board- which was not functioning at all due to a bad case connection  to 24B. Next he examined the transformer which had power coming from 240B, but there was no outgoing power to 24B. Turned off the power to 240B took off all wired going to the transformer and started testing it- first coil for 24B.

Which showed continuity and 240b did not, witch means the transformer burned out. Technician replaced the transformer, at witch point the control board started working properly. Thru a wireless Honeywell was reserving the signal from thermostat- signal to AC-zone Climate Control was not there however. I was replaced the battery was replaced on the thermostat- which helped, there was a signal.

AC zone climate control - gave a signal to control board of the furnace, the furnace then gave a signal to 24B from 24B to the contactor. The contactor started with a rattle, the technician didn't like the sound of that right away. Everything was pointing towards the fact that the contactor needs to be changed, but technician decided to clean the contacts in the contactor instead. While the AC is running and the contactor is not working properly , the transformer was overheating - I wasn't able to keep my thumb on it which only meant one thing, that the temperature was above 120F. Since the cleaning of the contactor did help and it started up a lot better but still with a small rattle. Overall it was working just fine, the technician thanked them for choosing Sunny Appliance Repair and left to his next order. 

Schedule an appointment
and choose your discount
Request a callback

See more than 700 positive reviews on Yelp, Google+ and others
See more than 700 positive reviews on Yelp, Google+ and others
Are You Intrested in What Our Customers Think About Us?
Great service and very reasonable.
My washer dispenser was stuck and I called sunny appliance repair. They sent john and David for diagnostic same day. John and David were great and honest technician and solved the issue with ease. I highly recommend them. Great service and very reasonable.
Read more
Sapna N.
Chicago, IL
Yelp.com
Overall great experience and will definitely work with you guys again!
John was very professional, answered all my questions and gave me an honest and fair evaluation of our washer drainage issue. Overall great experience and will definitely work with you guys again!
Read more
Nitin G.
San Francisco, CA
Yelp.com
Great people best experience.
My washer and dryer was not working. I called Greg he showed upon time and fixed for washer and dryer at a very good price. Great people best experience.
Read more
Kuldeep K.
Fremont, CA
Yelp.com
We are very satisfied the service.
Our washer stopped working on Sunday late morning. We called Sunny Appliance Repair and they could make the same-day appointment on the afternoon. Initially, they told us that the technician would arrive somewhere 3-5pm, but the technitian, Anthony called us later to inform the specific time he would be arriving so that we didn't have to wait around his arrival. Anthony was very kind and fixed the washer within 10 min of his arrival. We are very satisfied the service.
Read more
Reiko S.
Berkeley, CA
Yelp.com
Will call on Sunny Appliances again for any other needs.
Sergei was fantastic. My washer won't go into a spin cycle and I called Sunny appliances - they set up an appointment ASAP and Sergei identified the problem immediately and fixed it in a breeze. Will call on Sunny Appliances again for any other needs.
Read more
Sudeep M.
Newark, CA
Yelp.com
Very helpful, highly skilled and friendly!
Very helpful, highly skilled and friendly! I came here for an issue with my cooker and they fixed it very quickly. Since it didn't take time, they didn't even charge me for it. I highly recommend going here if you have an issue with kitchen appliances , washers and sorts.
Read more
Vivek R.
Santa Clara, CA
Yelp.com
FREE 6 months warranty for parts replacement
2 hour window is required for an appointment
100% satisfaction guaranteed
FREE service call with repair
FREE 6 months warranty for parts replacement
2 hour window is required for an appointment
100% satisfaction guaranteed
FREE service call with repair
Extended warranty up to one year just for $25
We work 7 days a week 7 a.m.–8 p.m.
FREE service call with repair
Extended warranty up to one year just for $25
We work 7 days a week 7 a.m.–8 p.m.
FREE service call with repair
Service Area

We offer appliance repair at competitive prices in San Francisco Bay Area, including the following counties: 

Alameda County

  • Oakland
  • Alameda
  • Albany
  • Berkeley
  • Castro Valley
  • Dublin
  • Emeryville
  • Fremont
  • Hayward
  • Livermore
  • Newark
  • Piedmont
  • Pleasanton
  • San Leandro
  • Union City
  • Surrounding area

Contra Costa Country

  • Clayton
  • Concord
  • Danville
  • El Cerrito
  • Hercules
  • Lafayette
  • Martinez
  • Moraga
  • Orinda
  • Pittsburgh
  • Pleasant Hill
  • Richmond
  • San Pablo
  • Walnut Creek
  • San Ramon
  • Surrounding area

Santa Clara County

  • Campbell
  • Cupertino
  • Gilroy
  • Los Altos
  • Los Altos Hills
  • Los Gatos
  • Milpitas
  • Monte Sereno
  • Morgan Hill
  • Mountain View
  • Palo Alto
  • Santa Clara
  • San Jose
  • Saratoga
  • Sunnyvale
  • Surrounding area

San Mateo County

  • Atherton
  • Belmont
  • Brisbane
  • Burlingame
  • Daly City
  • East Palo Alto
  • Foster City
  • Hillsborough
  • Menlo Park
  • Millbrae
  • Redwood City
  • San Bruno
  • San Carlos
  • San Mateo
  • Woodside
  • Surrounding area

San Francisco County

  • San Francisco
  • South San Francisco
Bread Oven Nu-Vu UB-5/10 - won’t heat - Repair in San Jose, CA.
23.02.2017
Bread Oven Nu-Vu UB-5/10 - won’t heat - Repair in San Jose, CA.

This customer’s Nu-Vu UB-5/10 Bread Oven stopped working. At first glance, everything seemed to be working fine, but with a more thorough check the tech noticed that the control board was not getting 208V power. He had to pull up the the whole power supply diagram before doing any further work. Once he was familiar with that, he started checking the wires and was finally able to find the disconnection and fix it. Most likely, one of the wires was simply defective.

Read more

Refrigerator TurboAir M3R47-2 - defrosting issues - Repair in San Jose, CA.
23.02.2017
Refrigerator TurboAir M3R47-2 - defrosting issues - Repair in San Jose, CA.

We got a call for commercial order from the Indian Street Cafe. They needed urgent help with their TurboAir fridge that had stopped working properly. During the diagnostic our technician noticed a big chunk of ice that has accumulated on the evaporator coil. Apparently the seal of the fridge was not airtight anymore. Replacing the door gaskets and the defrost sensor fixed the defrosting problem of TurboAir M3R47-2 fridge.

Read more

Refrigerator GE PSC25MSTASS - making weird noise when dispensing water- Repair in San Jose, CA.
23.02.2017
Refrigerator GE PSC25MSTASS - making weird noise when dispensing water- Repair in San Jose, CA.

Whenever the customer was trying to get some water from the water dispenser of his GE fridge, there was scary loud humming noise which seemed to be coming from where the water filter is connected. Our tech decided to try replacing the Refrigerator Water Filter Head Assembly Part #: WR17X11894 - and it fixed the problem. With the new water filter assembly the humming noise during water dispensing has stopped.

 

Read more

All articles (189)

Transformer keeps going out on a 24B  AC untit/furnace Carrier 48XPN. Client calls Sunny Appliance Repair to have a tech come and take a look at his AC unit. When the technician got there he ask to point him toward the unit, thats when he discovered it was located on the roof. He client gladly provided a latter. Once up there he was able to see a big furnace/AC unit(2 in 1) Carrier48XPN. Technician opened the lid to inspect, first he checked that there was power going to contact 240B. He did that to insure everything is ok with the safety switches. Next he star examining the control board- which was not functioning at all due to a bad case connection  to 24B. Next he examined the transformer which had power coming from 240B, but there was no outgoing power to 24B. Turned off the power to 240B took off all wired going to the transformer and started testing it- first coil for 24B.

Which showed continuity and 240b did not, witch means the transformer burned out. Technician replaced the transformer, at witch point the control board started working properly. Thru a wireless Honeywell was reserving the signal from thermostat- signal to AC-zone Climate Control was not there however. I was replaced the battery was replaced on the thermostat- which helped, there was a signal.

AC zone climate control - gave a signal to control board of the furnace, the furnace then gave a signal to 24B from 24B to the contactor. The contactor started with a rattle, the technician didn't like the sound of that right away. Everything was pointing towards the fact that the contactor needs to be changed, but technician decided to clean the contacts in the contactor instead. While the AC is running and the contactor is not working properly , the transformer was overheating - I wasn't able to keep my thumb on it which only meant one thing, that the temperature was above 120F. Since the cleaning of the contactor did help and it started up a lot better but still with a small rattle. Overall it was working just fine, the technician thanked them for choosing Sunny Appliance Repair and left to his next order.