More Heating, Air Conditioning, Fridge, HVAC Answers
Question Library
Ask a question about Heating, Air Conditioning, Fridge, HVAC
Volunteer
Experts of the Month
Expert Login
Awards
About Us
Tell friends
Link to Us
Disclaimer
|
| |
|
|
| |
| | | |
About Craig HVAC Expert
Expertise
I have been in the HVAC field for the past 12+ years. I can help with most HVAC questions. I work on commerical buildings for the most part, and have yet to find anything I could not troubleshoot and repair, when repairable. I work on small 1 ton units to a 2500 ton chiller. Troubleshoot air flow, elect, and control problems. I attend regular classes to keep up with the latest and greatest.
Experience
I have work in the HVAC trade for the past sixteen years. I work on commerical sites, hospitals, gov't buildings. I can troubleshoot just about anything in the HVAC business.
Education/Credentials
5 years union trade school, VFD training classes, Liebert factory training, some York and Trane factory training.
| | |
| |
You are here: Experts > Home/Garden > Home Appliances > Heating, Air Conditioning, Fridge, HVAC > Robershaw 7200DER gas valve.
Expert: Craig HVAC Expert - 10/26/2009
Question
Hello; thanks for your expertise. I have a 17-yr-old Robertshaw 7200DER gas valve that was malfunctioning; it would let a little gas through upon activation, then gas supply would drop, leading to stuttering and then shutoff. I had HVAC techs in to look the furnace over; none could identify the problem. Out of desperation, before I spent for a new furnace, I unscrewed the large cover screw on a post near the on/off switch on the gas valve (pretty much right above the word "pilot" on the side of the unit), took out the screw within, and found a spring. I simply stretched out the spring, put it back in, turned down the inner screw (which pushes down on the spring) all the way, and the unit now seems to work great. The flame is almost all blue, just a tinge of orange at the edges, no sputtering, no going out, nothing...seems just like new. So, my question...is there anything potentially dangerous about what I did? I presume I changed a factory setting? I don't trust the HVAC people around here to know anything about this; they have not inspired confidence. I don't think they would know how to do a fuel mixture test or anything of the sort. I don't mind spending money for a good tech, but even the large companies have failed me in regard to competence...all they want to do is sell a new unit.
If you have anything to offer in this regard, I would appreciate it. I realize it is a bit of an odd question. Thanks again for your time.
Answer
Assuming the furnace is in good working order, there is no reason to replace it. You should be able to just replace the gas valve and be done with it. As I am not really sure what you took apart, I am not sure what you may have done. Since you are working with gas, blowing up the furnace or burning down the house is possible if the valve were to somehow malfunction.
Craig
achelpguy@gmail.com
Ask a Question
|
|
